(D) A plankton net is the tool that a scientist would use to study microscopic plants and animals living in the ocean.
Marine scientists use various tools to study the ocean. A plankton net or beach seine net is a tool that is deployed to collect microscopic plants and animals including plankton, fish as well as other marine organisms in order to study them. It is generally lowered in the ocean and the scientists drag it behind a boat for gathering samples.
A current meter is a device that is used to measure current speed as well as direction in a water body.
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Why was the need for catalyst in the origin of life important?
Answer:
Catalysts are integral in making plastics and many other manufactured items. Even the human body runs on catalysts. Many proteins in your body are actually catalysts called enzymes, which do everything from creating signals that move your limbs to helping digest your food. They are truly a fundamental part of life.
Which statement is true of all scientific laws?
A. They were established by scientists hundreds of years ago.
OB. They are factual explanations that cannot be questioned.
OC. They describe nature through the past, present, and future.
D. They must be based on mathematical formulas to be valid.
Answer:
C
Explanation:
C is the correct answer because all of the scientific laws ultimately described nature one way or another.
4. Choose the best answer.
The atmosphere is a(n) _______ system.
O triangular
O closed
O open
O man-made
Answer:
Explanation:
o closed you wouldn’t want random gases mixing together
What action should you take to keep Mohammad Nassar from exposing the other patients in the reception area
The action that one should take in order to keep Mohammad Nassar from exposing the other patients in reception area is to follow proper guidelines and instruct the other patients in the following manner:-
To ensure regular washing of hands and proper maintenance of personal hygiene.The patients should be instructed to carry a mask while visiting the hospital. They should be asked to cover their nose as well as mouth with a cloth or the mask in the hospital.Since there is an outbreak of novel influenza A, therefore the patients should be advised to maintain proper distance among themselves.Informing and educating the patients about the outbreak of novel influenza A is the best action to create awareness among the patients.To learn more about novel influenza A here
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Pests destroy approximately what percentage of all food crops?
A. 1/20
B. 1/3
C. 9/10
D. 3/4
Please answer asap!!
Why do you think the plant cell has a square, rigid shape unlike the animal cell?
Answer:
Due to the presence of cell wall
Explanation:
ithinkso:)
Question #1
Long Text (essay)
Submit your project researching some environmental problems caused by the agriculture and natural resource industry. Be sure your
essay includes the following:
the name of the article, author, andpublisher or site owner;
• a description of the problem;
• a discussion of how it relates to agriculture or natural resources;
.
a discussion of potential solutions to the problem; and
• a discussion of your own ideas on the causes of and solutions for the problem.
Issues and Needs in Science identified by the USGS as being connected to agricultural practices' environmental impacts are as follows:
Effects of habitat fragmentation and changing land use on animals.Juggling competing water demands from the urban and agricultural sectors.Interactions between surface water, subsurface water, and air that have an impact on water quality.Water quality effects of irrigation, drainage, and return flow in agriculture.The creation and application of cutting-edge farming methods to preserve soil and water and enhance water quality.Genetically modified creatures' effects on naturally occurring species and environments.Rapid assessment methods and tools for locating agricultural contamination sources.Impacts of pesticides, fertilizers, and sediments on the habitat quality and health of fish and wildlife.Effects of soils, riparian forests, and wetlands—characteristics of watersheds—on nutrient uptake, retention, and cycling.Endocrine disruptive substances, veterinary medications, feed additives, hormones, and infections are transported across terrestrial and aquatic ecosystems and ultimately end up there.Learn more about environmental pollution here:
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Question 1 Humans and African Apes share many characteristics yet each is a distinct species. 1.1 Name FIVE characteristics that humans share with African Apes. 1.2 Name TWO characteristics that differentiate humans from African Apes. (5) (2) 1.3 Describe how each of the following structures is different between humans and Apes: (a) Spine (b) Pelvic girdle (2) (2) 1.4 Explain the significance of the changes to the teeth of humans that show progression in evolution. (4) (15)
Since we are mammals, primates, and hominoids, we have a lot in common with all of these other animal species, especially with our closest relatives, the apes. Our species, Homo sapiens, belongs to the genus Homo, but we are also hominins. Knowing our evolutionary history means knowing what we share with other primates as well as what has transpired in the 7–10 million years since we split from other African ape lineages. or more precisely, what transpired during the two million years of our own genus' existence. There is strong evidence that over the Pleistocene, our lineage endured substantial modifications to their bodies, behaviors, and ecologies, which led to the emergence of a human niche. This essay provides an overview of the significant parallels and distinctions between apes and humans.
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Which of the following reasons explains why electrical cords are plastic coatings with metal wires on the inside?
Explanation:
metal has high electrical conductivity,but so you don't get electrocuted the metal has plastic coating because Plastic has low electrical conductivity
Amono acids include a side chain as well as?
Firstly, It's Amino acids. And moving to the answer now. This contains the hydrogen atoms, the carboxylic group, and the amine group.
A basic amino group (NH2), an acidic carboxyl group (COOH), and a specific organic R group (or side chain) are the three organic molecules that make up an amino acid. Alpha-amino [alpha-amino] carboxylic acid is referred to as an amino acid informally. An amino and a carboxyl group are both joined to the core carbon (C) atom, known as the -carbon, in every molecule. A hydrogen (H) atom and the R group typically fulfill the remaining two bonds of the -carbon atom. The building components of proteins are amino acids. The great majority of chemical processes that take place in cells are catalyzed by proteins. They give cells a lot of their structural components and aid in fusing cells into tissues.
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1. How would you make 100 ml of a 10 mM solution when you have 10 ml of a 2M solution?
2. How would you make 1 liter of 1X solution with a starting 50X stock?
3. Perform a serial dilution (drawing) showing how you would make 1 ml of a 1 uM solution using no more than 1 ml of a 1 M stock.
You need to take 0.02 L of the stock solution and make up to the one liter mark.
What is serial dilution?The term serial dilution has to do with the ability to prepare a solution from another. We have to determine the amount of the 2M solution to use.
1) Thus, you would need to add 90 mL of distilled water to the 10 ml of a 2M solution to obtain the 100 ml of a 10 mM solution.
2) Using C1V1 = C2V2
C1 = Initial concentration
V1 = initial volume
C2 = final concentration
V2 = final volume
50 * v1 = 1 * 1
V 1 = 1/50 = 0.02 L
You need to take 0.02 L of the stock solution and make up to the one liter mark.
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three challenges of the ecosystem management approach
There are several challenges of the ecosystem and they are mentioned below:
interdisciplinary collaboration is difficult due to differences in professional culture and values.roles and responsibilities of different participants are often not sufficiently clear. implementing EBM is very costly.What is ecosytem?Ecosytem is defined as a community that is biological by nature and the organism in that community attract with each other as well as their physical environment. Ecosystem is consist of both biotic as well as abiotic factor. The living components of ecosystem comes in category of biotic factor and non living components of ecosystem comes in category of abiotic factor.
Biodiversity is all the different kinds of life living in a particular area like the variety of animals, plants, fungi and microorganisms like bacteria and virus that plays a major role in framing of natural world usually three levels of biodiversity are observed and these are genetic species, and ecosystem diversity. Biodiversity is very important for the process that's support all life present on earth including human.
Therefore, interdisciplinary collaboration is difficult due to differences in professional culture and values.
roles and responsibilities of different participants are often not sufficiently clear. implementing EBM is very costly.Learn more about ecosystem here:
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what do hippopotamus eat
Grass
Explanation:
Hippos have a healthy and mostly herbivorous appetite. Adults eat about 80 lbs. (35 kg) of grass each night, traveling up to 6 miles (10 km) in a night to get their fill. They also eat fruit that they find during their nightly scavenging, according to National Geographic.
Over the years, scientists have developed several systems for the classification of organisms. From the late 1960s, organisms had been classified
according to a five-kingdom system. This classification system model was based on principles developed by Swedish scientist Carolus Linnaeus, whose
hierarchical system groups organisms based on common physical characteristics. This system recognized five kingdoms: Monera (bacteria), Protista,
Fungi, Plantae, and Animalia. The scheme divided life into two main divisions based on cell structure: the Prokaryotae (bacteria) and the Eukaryota
(animals, plants, fungi, and protists). As scientists learned more about organisms, classification systems changed. Genetic sequencing has given
researchers a new way of analyzing relationships between organisms. The current system, the three-domain system, classifies organisms primarily
based on differences in ribosomal RNA (rRNA) structure. Under this system, organisms are classified into three domains and six kingdoms. The domains
are Archaea, Bacteria, and Eukarya: two prokaryotic domains and one eukaryotic. Recent work in the classification of life has shown that what was once
called prokaryotes are much more diverse than previously suspected. The prokaryotic domains also represent two distinct kingdoms, the Eubacteria,
and the Archaebacteria, and are as different from each other as either is from the Eukaryota. The kingdoms are Archaebacteria (ancient bacteria),
Eubacteria (true bacteria), Fungi, Plantae, Protista, and Animalia. The Eukarya domain includes eukaryotes or organisms that have a membrane-bound
nucleus. Eukaryotes have rRNA that is distinct from bacteria and archaeans.
Can you distinguish life in the thee domains and kingdoms?
The single feature that separates the domains in the cladogram is cell structure.
Based on this classification system, we can say that plants and animals are more alike than plants and
bacteria.
The domains Archaea and Bacteria differ from each other biochemically.
The domains Archaea and Bacteria both have organisms composed of prokaryotic cells.
The Archea are more closely related to the Eukarya than they are to the Bacteria.
According to this cladogram, scientists believe that all kingdoms evolved from a common ancestor HELP!!!!!
Algae in an aquatic food chain convert solar energy into 93,000 kilocalories of plant tissue.
Which of the following values best represents the amount of energy available for secondary consumers in the food
chain?
(A) 930 kilocalories
(B) 9,300 kilocalories
(C) 93,000 kilocalories
(D) 930,000 kilocalories
Algae in an aquatic food chain convert solar energy into 93,000 kilocalories of plant tissue. 930 kilocalories represents the amount of energy available for secondary consumers in the food chain.
The transfer of 93,000 kilocalories to the secondary consumer is done by the 10% law. The 10% rule states that ''10% of the energy transfer occurs from one trophic level to the following one after it. The remaining energy is lost during energy transfer and respiration. The most energy is found in the first trophic level.
Transfer of 93,000 kilocalories to the primary consumer can be calculated by,
Energy available for Primary Consumer= [tex]\frac{93,000 kcal x 10}{100}[/tex] = 93,00 kcal
Transfer of 93,00 kilocalories to the secondary consumer can be calculated by,
Energy available for Secondary Consumer= [tex]\frac{9300 kcal x 10}{100}[/tex] = 930 kcal
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Give three important adaptation of peanut that able it to outcompete native plants in terms of nutrients.
Answer:
Explanation:
What are 3 reasons plants could develop a physical adaptation?
All plants, no matter where they grow, are adapted to certain conditions, which can include temperature, available water, soil type, and interactions with animals and other organisms.
Hope this helps :)
Explanation:
Tara's careful about punctuation and spelling when he writes letters to customers and clients which professional work habit is Pierre demonstrating a consistency adaptability see attention to detail the healthfulness timeliness
I need a diagram of the energy flow
Energy and energy transition are depicted graphically and mathematically using energy flow diagrams, also known as energy flow charts.
Energy production used as unprocessed fuels to feed a system, supply of energy, transformation or conversion, losses, and energy in use can all fall under energy flow. The autotrophs that absorb energy from the sun are an excellent example of how energy moves through an ecosystem. The autotrophs are then consumed by herbivores, who convert the plant's energy into energy flow they can use. After that, carnivores eat the herbivores, and then other carnivores eat the carnivores is energy flow.
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You have the freedoms of ____ speech, press; and the right to ___ peacefully and petition the government
You have the freedoms of religion, speech, press; and the right to assemble peacefully and petition the government.
What is constitution of freedom?Constitution of freedom governs certain laws that help its citizens to have freedom to choose what they like without any condition.
Indian constitution governs its citizens the freedom to choose any religion, follow it or practice it. There is freedom of speech and expression. They can peacefully assemble at any place and can move to any part of the country.
The citizens also have the right to practice any profession and have the freedom to report the government for law and justice.
Thus, constitution of freedom protects the fundamental rights of their citizens.
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Are stem cells, from in vitro fertilization clinics, fetuses?
Early-stage embryos, a collection of cells that develops when eggs and sperm are fertilized in a laboratory setting, are used to harvest embryonic stem cells.
The body's building blocks are stem cells, which are cells that give rise to all other cells with specific roles. Daughter cells are created when stem cells divide properly in the body or a lab to create more cells.Many concerns and problems regarding the ethics of embryonic stem cell research have been brought up since human embryonic stem cells are taken from human embryos.The eggs utilized in embryonic stem cell research were fertilized in in vitro fertilization labs but were never placed in the uteruses of women. Donors of the stem cells give their informed consent before donating them. In test tubes or petri dishes in laboratories, the stem cells can survive and develop in particular solutions.
There are many controversies in the use of stem cells.
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Carbapenems are b lactam antibiotics, as are penicillins and cephalosporins, which work by inhibiting cell wall biosynthesis in bacteria. In recent years, more cases, mostly in patients who have been hospitalized for a long period of time, of bacteria showing resistance to Carbapenems have been reported. In these patients, this drug could no long control bacterial infections. Check ALL the statements that are correct:
Question 1 options: Bacteria that are resistant to Carbapenems did not exist before these drugs were used.
Carbapenems are the selecting agent Bacteria become resistant only after they come into contact with Carbapenems
This development of drug resistance by bacteria is an example of evolution
Non-resistant bacteria become resistant strains via mutation
The rate of mutation (to resistant strains) is always increased by the use of Carbapenems
The rate of survival among resistant bacteria is always increased by the use of Carbapenems
The change from non-resistant to resistant bacterial strains are not due to changes in genes.
Cabapenem-resistant bacteria may come into existence if Carbapenems are not used.
Only once bacteria come into touch with carbapenems do they develop resistance. This bacterial drug resistance is an illustration of how non-resistant bacteria can mutate into resistant strains.
The original "carbapenem," thienamycin, would become the parent or model compound for all subsequent carbapenems. Recent research demonstrates unequivocally that carbapenem resistance is growing globally. In particular when porin losses occur, excessive synthesis of weak carbapenemases as CMY-10 and PDC Beta-lactamases might result in carbapenem resistance. Gram-positive bacteria develop resistance to carbapenems and other beta-lactam antibiotics through mutation-derived modifications to their PBPs, whereas Gram-negative bacteria frequently enlist the help of additional defense mechanisms to combat the effects of these drugs.
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A pH of 2 has ___________ times more hydrogen ions than a pH of 5.
Answer:
A pH of 2 has 1000 times more hydrogen ions than a pH of 5.
Explanation:
Phenomena: What
happens to the fat
you "burn off"
during exercise?
How does food
make us gain
weight?
What type of eye protection is required in a lab? a. Lab-grade goggles all the time for anyone working with chemicals b. Lab-grade goggles all the time for everyone c. Lab-grade goggles if you don’t wear glasses.
You pour 100 ml juice in each glass for your family. What scientific measurement you are making?
Answer:
Name the stage of Breathing represented by the apparatus in Diagram 1 and 2
What is the best way to describe how hereditary information is carried in prokaryotic cells?
Answer:
on a single circular piece od DNA wich is attached to the cell membrane and in direct contact with the cytoplasm
kinetic energy is transformed to potential energy by mitochondria and chloroplasts true or false
Describe the two types of climate hypothesis that involve interactions between CO2 and weathering.
The two types of climate hypotheses that involve interactions between CO2 and weathering are as follows:
Over the years the volcanoes and mid-ocean ridges have been constantly casting carbon dioxide into the Earth's atmosphere. Despite this, the planet has stayed largely habitable. The primary cause for this is that carbon dioxide is also constantly drawn down from the atmosphere via chemical weathering reactions with the rocks at the surface. Weathering is the procedure by which carbon dioxide present in the atmosphere breaks down rocks and then gets entrapped in a deposition. It is an important part of Earth's carbon cycle, shuffling carbon dioxide between the atmospheric regions, and controlling global temperatures. By sealing carbon dioxide out in deposits, weathering extracts it from the atmosphere over extended timescales, decreasing the greenhouse effect and decreasing Earth's temperatures.To learn more about climate here
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yir-ytnf-wdbEvery month a man consumes 25 kg rice and 9 kg wheat. The price of rice is 20% of the price of wheat and thus
The price of rice and consumption of wheat %decrease in the amount of rice is 36%.
What makes consumption so important?One of the more complex concepts in economics, consumption is crucial since it influences the health and development of the economy. Businesses can start up and offer a variety of fantastic things, but if we don't buy or use them, they won't last very long.
Calculation:Suppose wheat costs x per kilogram. Wheat will then cost 5 times as much per kilogram.
Expenditure on rice = 25*x = 25x.
Expenditure of wheat = 9*5x = 45x.
Total cost,
25x + 45x = 350.
70x = 350.
x = 5.
Hence, price of Rice = Rs. 5 per kg.
Price of wheat = 25 per kg.
price of wheat = 25 ---- 20% ----> Rs. 30 per kg.
Rice be N kg
N*5 + 9*30 = 350.
N = 16 kg.
Rice decrease as a percentage = [(25-16)*100]/25=36%.
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The complete question is -
Every month a man consumes 25 kg rice and 9 kg wheat. The price of rice is 20% of the price of wheat and thus he spends total Rs. 350 on the rice and wheat per month. If the price of wheat is increased by 20% then what is the percentage reduction of rice consumption for the same expenditure of Rs. 350? Given that the price of rice and consumption of wheat is constant :
A-4
B-25
C-36
D-24
Consider the scenario.
A scientist sets up an experiment to see how sugar in the diet of
rats affects their weight. The scientist feeds one group of rats a
diet high in sugar, another group a diet of moderate sugar levels,
and a third group a diet low in sugar.
All of the rats in the experiment are the same species and age
and start the experiment at a healthy weight. The rats also
receive the same kind of sugar.
What is the dependent variable?
A. amount of sugar
B. species of rats
C. starting weight of rats
D. final weight of rats
Answer:
amount of sugar is the independent variable