Populations on nearby islands are more likely to be genetically isolated than populations that are equally close to one another on the mainland.
Allopatric speciation happens when there is geographical separation and, as a result, no gene flow between separated populations. This prevents the introduction of new genes into the newly isolated populations, which enables them to evolve in their own unique ways. In most cases, this is the result of a geographical barrier that has resulted in the population being split into two (or more) subpopulations.
It is more common for populations on nearby islands to be genetically isolated than it is for populations that are similarly close to one another on the mainland to be genetically isolated.
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Which feature is shared between adherens junctions and desmosomes?a. Both contain cadherinsb. Both connect the intermediate filaments of neighboring cellsc. Both connect the actin cytoskeleton of neighboring cellsd. Both promote contraction of a cell layere. Both provide physical strength to a cell layer
The feature that is shared between adherens junctions and desmosomes is a. Both contain cadherins.
One type of modification to the cell surface is the extracellular matrix. It supports the plasma membrane, enables cell adhesion, communicates with the cytoskeleton, and is made up of proteins and polysaccharides. External forces can be prevented from compressing and stretching the ECM. The "intercalating discs," which are not present in skeletal muscles, connect the cells of the cardiac muscle. The gap junctions and desmosomes are the components of intercalating discs. Although adhesion junctions support the cells mechanically, they do not form a seal between two cells' plasma membranes. Cadherins are the proteins that make up the adherens junctions and desmosomes.
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__ are heterotrophic unicellular or multicellular eukaryotic organisms including yeasts, molds, and mushrooms.
Answer:
Kingdom Fungi
Explanation:
Kingdom fungi-
* mostly multicellular, some unicellular
* eukaryotes
* external heterotrophs, dissolve food outside the body
* cell walls made of chitin
* reproduces sexually and asexually
the stage in which the cytoplasm divides and results in two cells with identical nuclei
Answer:
Cytokinesis
Explanation:
The process of producing 2 identical daughter cells is called mitosis.
There are 4 stages to this: Prophase, metaphase, anaphase, and telophase/ cytokinesis.
Your question focuses on telophase/ cytokinesis. In telophase, the spindle connecting the chromosomes dissolve, and each 'cell' has their own nucleus, however they are still connected. In cytokinesis the cytoplasm divides, forming 2 separate cells.
what are two features that make plasmids useful for transforming cells?
Plasmids have genetic markers and DNA sequences that encourage plasmid replication.
What are plasmids and what is its function?A plasmid is a type of double-stranded, circular, tiny DNA molecule that differs from a cell chromosomal DNA. Both bacterial and certain eukaryotic cells naturally contain plasmids. Plasmids frequently carry genes that give bacteria genetic advantages like antibiotic resistance. Plasmids can form hundreds of thousands of base pairs in length. Each daughter cell of a bacterium receives a copy of every plasmid that is present in mother cell when it divides. Another way that bacteria can exchange plasmids through a process known as conjuction.
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Does your MyPlate Plan match your actual food intake? Explain your findings.
My MyPlate Plan does not match my actual food intake because I take more carbs and fats than recommended.
What is the MyPlate Plan ?The MyPlate Plan is a nutrition guidance system created by the U.S. Department of Agriculture (USDA) to help people make healthier food choices. It provides recommendations on the proportion of different food groups that should be included in a balanced diet.
The MyPlate Plan replaces the previous nutrition guidance system, the food pyramid, and emphasizes the importance of making half of one's plate fruits and vegetables, and including protein, whole grains, and dairy in the remaining portion.
Sadly, I have not been able to abide by the MyPlate Plan as I take more than the recommended amount of carbs and fat.
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What are two names for cells that transport oxygen in the blood?
Red blood cells and Erythrocytes are two cells that transport oxygen in the blood.
Red blood cells are round with a flattish, indented center, like doughnuts without a hole. Your healthcare provider can check on the size, shape, and health of your red blood cells using a blood test. Inside red blood cells, there is a protein called hemoglobin. The oxygen it contains. Carbon dioxide is also expelled from your body by red blood cells, who then transport it to your lungs so you can breathe it out. It is the bone marrow that produces red blood cells. Normally, they only survive for 120 days or so before passing away.
an assortment of blood cells that are produced in the bone marrow and are present in the blood. Hemoglobin, a protein found in erythrocytes that transports oxygen from the lungs to every cell in the body, is a vital component of the erythrocyte. Typically, a complete blood cell (CBC) test includes checking the erythrocyte count in the blood. Leukemia, dehydration, malnutrition, and anemia are just a few of the illnesses that it can be used to check for. Red blood cells are also referred to as RBCs.
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The allele for having freckles is dominant to the allele for no freckles. Mary's father is
heterozygous for freckles. Her mother has no freckles. Make the cross and determine the
chances of Mary having freckles.
PLSSS HELPP I NEED IT BY TODAY
Answer: 50%
Explanation:
Explain how a carbon atom in an organic molecule in a giraffe could become a carbon atom in an organic molecule in a tree. (Hint: A complete answer will include cellular respiration, photosynthesis, and biosynthesis.)
A carbon atom in an organic molecule in a giraffe could become a carbon atom in an organic molecule in a tree by the following process:
during the process of cellular respiration, the giraffe releases carbon dioxide into the atmosphereIn the process of photosynthesis, plants use carbon dioxide to make sugar molecules by means of biosynthesis.What is photosynthesis?Green plants and certain other species employ the process of photosynthesis to create nutrition from carbon dioxide and water. In most cases, the green pigment chlorophyll is used in photosynthesis in plants, which produces oxygen as a byproduct.
Plants and other living things employ a process called photosynthesis to transform light energy into chemical energy that can subsequently be released through cellular respiration to power the organism's activities.
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Which explanation is most consistent with how long digits develop in bat embryos?
The development of long digits in bat embryos is explained by the process of digit elongation that is a result of the differential growth of the bones and tissues, and genetic and environmental factors regulate this.
What is the significance of the digit elongation?The digit elongation is due to the expression of specific genes and hormonal signaling, which means it is dependent upon genetics and the external environment, and cells in the developing digits undergo proliferation and differentiation to form the bones, muscles, and joints.
Hence, the development of long digits in bat embryos is explained by the process of digit elongation that is a result of the differential growth of the bones and tissues, and genetic and environmental factors regulate this.
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In terms of mechanism, recessive traits are usually?
In terms of mechanism, recessive traits are only expressed in the 'phenotype' when two such (recessive) alleles are present.
Recessive refers to the relationship between an observed trait and the two inherited forms of a gene associated with that trait in terms of genetics. Each gene has two alleles that are inherited from each parent by the individual. A recessive trait is one that is caused by two identical alleles, and both of these alleles must be present for the characteristic to manifest. When only one copy is present, a recessive allele does not result in any phenotype at all. As opposed to a dominant trait, which can only be expressed when one of the two alleles is present, this trait can exist in both alleles.
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The complete question is:
In terms of mechanism, recessive traits are usually
A. variants of an enzyme or protein that are not functioning in the wild.
B. Only expressed in the 'phenotype' when two such (recessive) alleles are present.
C. An example of dominant-negative mutations.
D. largely in carriers but present in the population (heterozygous individuals)
a scientist is studying a cell that has a rigid cell wall with many hair-like projections on the outer surface. the genetic material is not enclosed by a membrane. which cell is the scientist observing?
The scientist is observing a prokaryotic cell. They have a rigid cell wall that projections provides support and membrane protection for the cell.
Prokaryotic cells are single-celled organisms that lack a nucleus and other membrane-bound organelles. And often have hair-like projections called pili or fimbriae on their outer surface. These projections are involved in adhesion and communication with other cells. Prokaryotic cells are typically smaller and simpler in structure than eukaryotic cells, which do have a nucleus and membrane-bound organelles. In prokaryotic cells, the genetic material is not enclosed by a membrane, but is instead organized into a single chromosome that is usually located in the cytoplasm.
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What determines the specific wavelength of light absorbed by a cone cell?
The conformational shift in opsin caused by retinal light absorption activates a G protein.
Different rods and cones respond to different light wavelengths, or colors. When light strikes the rods and cones, electrical signals are sent to the brain. They do so via the optic nerve.
Cones are classified into three types: S-cones, M-cones, and L-cones. Each kind expresses a different opsin: OPN1SW, OPN1MW, and OPN1LW. These cones are sensitive to visible wavelengths of light, which correspond to short, medium, and long wavelengths of light, respectively. There are various types of opsins in cone cells that interact with retinal to create photopsin pigments.
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In an individual that is heterozygous at three loci, the number of possible gamete types is?
n is the number of heterozygous loci, and types of gametes equal 2 n. With three heterozygous loci, a diploid organism might produce 2 3 = 8 gametes.
In terms of genetics, heterozygotes are people who have inherited various alleles (variations) of a certain genomic marker from each of their biological parents. An individual who possesses two copies of a genetic marker is said to be heterozygous. A person who has identical copies of two different markers, however, is said to be homozygous. In diploid animals, each pair of chromosomes has two alleles, one from the mother and one from the father, for each gene that determines a trait. A gene's alleles, which can have two or more different forms, can all be found at the same locus on a chromosome. Different alleles for a particular trait can be said to be heterozygous.
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complete question
In an individual that is heterozygous at three loci, the number of possible gamete types is?
a) 2 b) 4 c) 8 d) 16
Once a sperm penetrates the cell wall of an egg and fertilizes it, this structure is known as what? a. An embryo. A fetus. c. Placenta. d. A teratogen. e. A zygote.
Once a sperm penetrates the cell wall of an egg and fertilizes it, this structure is known as option e. A zygote.
A zygote is known as a zygocyte in medicine. A diploid eukaryote is the name given to the embryo. During the zygote's mitosis, an embryo is created. A stage after the zygote stage is an embryo. Fertilization is the process that creates the zygote.
Male reproductive cells called sperm are produced in the testicles. The female reproductive cell known as an oocyte or egg is fertilised by sperm cells as they swim to it. Sperm count and sperm motility are two important variables that can impact male fertility.
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when eating a very-low-calorie diet for prolonged periods, the body may begin to obtain fuel from protein in lean body tissue. minerals stored in bone. glycogen stored in the brain. fluid reabsorption by the kidneys.
Eating a very-low-calorie diet for prolonged periods, the body may begin to obtain fuel from protein in lean body tissue.
The body converts food and liquids into energy through a process called metabolism. The calories from food and beverages combine with oxygen during this process to create the energy the body requires. Even when in rest, a body need energy to function.
More muscular individuals frequently have faster metabolisms that burn more calories. Age: As we age, we lose muscle, which causes the metabolism to slow. Sex: Compared to women, men often have faster metabolisms. They are leaner, have bigger bones, and less body fat.
When you are active and at rest, you will burn more calories if your metabolism is "high" (or fast). You will require more calories to maintain your weight if your metabolism is high.
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arthropods are the most numerous animals on earth. these traits were all part of their success except a standard number of appendages across all major taxa. jointed appendages. a rigid exoskeleton. waterproofing by chitin. specialization of different appendages.
"A standard number of appendages across all major taxa" is not a part of the success of arthropods.
What are Arthropods?
Arthropods are invertebrate animals that have an exoskeleton, a segmented body, and joint appendages. They make up the largest phylum of animals and include insects, spiders, crustaceans, and centipedes. Being the most diverse group of animals, show a great variation in the number of appendages among different taxa. For example, insects typically have six legs, while spiders and scorpions have eight legs. This diversity in the number of appendages, rather than a standard number across all major taxa, has contributed to the success of arthropods by allowing them to occupy a variety of habitats and perform a range of functions with their appendages.
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creates a maillard reaction on a steak say is?
The Maillard reaction is a complex chemical process that occurs between amino acids and reducing sugars, leading to the formation of new flavor and aroma compounds.
The Maillard reaction plays a major role in the browning and development of flavor in cooked meat, including steak.
When a steak is cooked, the heat causes the amino acids and sugars present in the meat to interact and undergo a series of chemical reactions. This results in the formation of a wide range of new compounds, including amino acid derivatives, sugar derivatives, and complex flavor and aroma compounds.
The Maillard reaction contributes to the complex, rich flavor profile of cooked meat, as well as its attractive brown color. The reaction is particularly important for steaks, as it contributes to the development of the savory and meaty flavors that are characteristic of well-cooked beef.
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another name of the digestive tract is the group of answer choices endocrine system integumentary system urinary tract gastrointestinal tract
The digestive system is comprised of the liver, pancreas, and gallbladder in addition to the gastrointestinal tract, which is also referred to as the digestive tract or the digestive tract therefore, option 4 is the right choice.
The digestive system consists of several organs that are hollow and are connected by a tube that winds its way from the mouth to the anus.
The mouth is used to take in food, which is then used to extract nutrients and absorb energy, and the waste from this process is discharged through the anus as feces. The term "gastric" and "intestinal" are both examples of the adjective "gastrointestinal," which means "of or relating to the stomach and intestines."
The complete question is;
Another name for the digestive tract is the group of answer choices; 1. Endocrine system
2. Integumentary system
3. Urinary tract
4. Gastrointestinal tract
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is the general term for carbohydrates composed of two monosaccharides.
Disaccharides is the general term for carbohydrates composed of two monosaccharides.
In the body, monosaccharides have two main purposes: power storage and serving as the structural building blocks for more complex carbohydrates. A form of carbohydrate that can't be hydrogenated into smaller carbs is a monosaccharide, commonly referred to as a simple sugar.
Disaccharides function similarly to other carbohydrates as a source of energy for the body. When we consume foods containing disaccharides, our systems convert them into monosaccharides, or simple sugars, for absorption in the small intestine. When two monosaccharides (simple sugars) are connected by a glycosidic bond, a disaccharide, also known as a double sugar, is created.
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a wild-type fruit fly (heterozygous for gray body color and red eyes) is mated with a black fruit fly with purple eyes. the offspring are: wild-type721 black-purple751 gray-purple49 black-red45 part a what is the recombination frequency between these genes for body color and eye color? express your answer as a percentage
A wild-type fruit fly is mated with a black fly with vestigial wings (heterozygous for gray body color and normal wings). The phenotypic distribution of the children is as follows: 778 are wild-type; 785 are black-vestigial; 158 are black-normal; and 162 are grayvestigial.
A wild-type fruit fly is married with a black fruit fly with purple eyes (heterozygous for gray body color and red eyes). There are 721 wild-type offspring, 751 black purple offspring, 49 gray purple children, and 45 black red offspring.
Wild-type fruit flies (Drosophila melanogaster) have gray bodies and red eyes. Certain mutations can alter these characteristics. Flies with mutant bodies and/or eyes may have a black body and/or cinnabar eyes.
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an organism that obtains energy by eating other organisms is?
An organism that obtains energy by eating other organisms is Heterotrophs.
A heterotroph is an organism that eats other plants or animals for energy and nutrients. The term stems from the Greek words hetero for “other" and trophe for "nourishment."A heterotroph cannot manufacture its own food by carbon fixation and therefore derives its intake of nutrition from other sources of organic carbon, mainly plant or animal matter. In the food chain, heterotrophs are secondary and tertiary consumers.There are two subcategories of heterotrophs: photoheterotrophs and chemoheterotrophs. Photoheterotrophs are organisms that get their energy from light, but must still consume carbon from other organisms, as they cannot utilize carbon dioxide from the air. Chemoheterotrophs, by contrast, get both their energy and carbon from other organisms.
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the earliest step in tissue repair involves: a. replacement of destroyed tissue by the same kind of cells. b. proliferation of fibrous connective tissue. c. formation of scar tissue. d. formation of granulation tissue.
Option d is Correct. Granulation tissue is formed as the first stage of tissue restoration. This is the initial phase of recovery. The wounded site is now being closed by coagulation.
When blood escapes the body, hemostasis tissue begins. Blood arteries contracting to lessen blood flow is the initial stage of hemostasis. Platelets then adhere to one another to seal the blood vessel wall's tear.
Regeneration is a sort of healing when new growth entirely transforms injured tissue sections back to their pre-damage state. Fibrosis, also known as fibrotic scarring, is a pathological form of wound healing when connective tissue replaces healthy parenchymal tissue to the point where it continues unchecked, significantly remodeling the surrounding tissue and forming a permanent scar.
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the functional differences, as well as differences in three-dimensional structures, between two different enzymes from mammalian cells result directly from their different:
The functional and structural differences between two different enzymes from mammalian cells result directly from their different amino acid sequences.
Enzymes are proteins that are responsible for catalyzing chemical reactions in the cell. The specific function and shape of an enzyme is determined by the sequence of its amino acids, which folds into a unique three-dimensional structure. This structure allows the enzyme to interact with specific substrates in a specific way, enabling it to carry out a specific reaction. If the amino acid sequence of an enzyme changes, it can result in a change in its function or structure, leading to a different activity or specificity.
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The complete Question is:
What are the factors that result in differences in functional differences and 3D structures between two different enzymes from mammalian cells?
A = dominant
a = recessive
In which of the following situations
would the dominant trait AWLAYS
appear?
A: when ALL gametes receive the dominant allele (A)
B. when ALL gametes receive a recessive allele (a)
C. when some gametes receive the recessive allele (a) and
the others do not receive an allele
Answer:
A
Explanation:
when all gametes receive the dominant allele(A)
Glaciers can (mark all that apply) Choose 3 erode Earth's surface move earth slide over the Earth's surface carve the land they move produces features that are more distinct change color
The main idea of Wegener's continental drift theory was that Land masses move across Earth's surface over time.
What is continental drift theory?The continental drift theory is the theory that believes that the earth surface is made up of land masses which drifts across the Earth, sometimes plowing through oceans and into each other.
The continental drift theory is most associated with the scientist Alfred Wegener, whom in the early 20th century believed that Land masses move across Earth's surface over time.
Therefore, The main idea of Wegener's continental drift theory was that Land masses move across Earth's surface over time.
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why is carbon dioxide important
Answer: Carbon dioxide is an important greenhouse gas that helps to trap heat in our atmosphere. Without it, our planet would be inhospitably cold. However, an increase in CO2 concentrations in our atmosphere is causing average global temperatures to rise, disrupting other aspects of Earth's climate.
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how might the floods in china and other countries affect the overall climate of the earth?
Floods lead to destruction of an already degraded system which leads to the removal of vegetation in and around rivers serves to increase channel size, clean dams, levees and catchment areas in China and other countries which affect the overall climate of the Earth.
What is Flood?Flood is defined as an overflow of water that submerges land that is usually dry that is tidal flow. The flood discipline is an area of study of hydrology and is of significant concern in agriculture, civil engineering and public health.
These can lead to degrade hill-slopes, streams and floodplains, and remove both sediment and nutrients. This can be caused by heavy rainfall and the ocean waves coming on shore, such as a storm surge.
Thus, Floods lead to destruction of an already degraded system which leads to the removal of vegetation in and around rivers serves to increase channel size, clean dams, levees and catchment areas.
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how does the allometric exponent that you estimate for rodents compare to the exponent that you estimated for all mammals combined?
The allometric exponent estimated for rodents is typically different from the exponent estimated for all mammals combined. Allometric exponents describe the scaling relationship between the size of an organism
various biological traits such as metabolic rate, lifespan, and other morphological characteristics.
The allometric exponent for rodents is generally around 0.75, which indicates that as the size of a rodent increases, its metabolic rate increases at a slower rate than proportional to its size. On the other hand, the allometric exponent for all mammals combined is usually around 0.67, which suggests that as the size of a mammal increases, its metabolic rate increases at an even slower rate compared to proportional to its size.
It is important to note that these exponents can vary between different groups of mammals and even between species within the same group. The differences in allometric exponents reflect evolutionary adaptations that have allowed mammals to efficiently allocate resources based on their particular ecological niches and life history strategies.
Therefore, the allometric exponent estimated for rodents is generally different from the exponent estimated for all mammals combined because rodents, as a group, have distinct biological and ecological characteristics that result in different scaling relationships between size and metabolic rate.
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The largest unit within gene flow can readily occur is a_____.
The largest unit within which the gene flow can occur very readily is a species.
In population genetics, gene flow which is also known as gene migration or allele flow is basically the transfer of genetic material from one particular population to another population. If the rate of gene flow is high then two populations among which it is happening will have an equivalent allele frequencies and therefore they can be considered as a single effective population.
Gene flow is a very crucial mechanism which is responsible for transferring genetic diversity among different populations. High rates of gene flow can also end up reducing the genetic differentiation between the two population and hence increasing homogeneity. Species is the largest unit within which the gene flow can occur readily.
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