Biology

1. Which European countries sent explorers during the Age of Contact thatset foot in Texas? *
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HELP!!...............
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The only type of human cell that is never replaced is ___. *
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help me please, its biology i need help with the answer an why you chose that answer
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The number of wild horses, per square mile, in a prairie, is the horse population5 pointsDensityDispersionSizeBirth ratecalculate the Deer population for the
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Tim does not need to factor his amino acid consumption into the total protein intake because they are components of protein, not full protein
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see attached...thank you
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Edrophonium is a drug the blocks cholinesterase from breaking down acetylcholine in the muscles. Why does this improve Annie's muscle function?
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Perhaps no one cares more about being able to see in the ocean than do divers. The Cayman Islands, Bonaire and the Bahamas are all popular dive destinations due to both submarine features, such as coral reefs, and water clarity. Under the best of circumstances, visibility in these locations is between 50 ft (15 m) to 150 ft (45 m). Based on this, and what you have learned about sound, write a paragraph describing those ways in which humans and marine organisms use sound for some underwater tasks and light for others.
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Which substance has a low albedo?A. A black asphalt roadOB. A beach of white sandO O OC. A shiny buildingD. An iceberg
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Explain how altitude affects ecosystems
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An alien has a mass of 75 kg and weighs 225 N. What is the accelerationdue to gravity on the alien's home planet? Don't forget units! *
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PLS HELP!!In a normal distribution, the number of organisms exhibiting a phenotype variant near the lowest value is(1 point)-greater than the number exhibiting a variant near the highest value.-greater than the number exhibiting a variant near the middle value.-less than the number exhibiting a variant near the middle value.-less than the number exhibiting a variant near the highest value.Kamar is looking for his birth mother. Kamar knows that his blood type is AB and his fathers blood type is heterozygous A. What can Kamar assume about his mothers blood type?(1 point)-Kamars mother must be either AB or B because blood types AB is considered codominant.-Kamars mother must be AB because blood type AB is inherited from one parent.-Kamars mother must be O because the recessive allele allows for Kamar to get type A from his father.-Kamars mother must be either A or O because blood type AB is considered incomplete dominant.A statistician collects height data in inches for a school district. Which sample is most likely to produce a normal distribution?(1 point)-Grade 10-12Height Range 55 - 60 60 - 65 65 - 70 70 - 75Frequency 4 9 8 4-Grades 1-3Height Range 30 - 35 35 - 40 40 - 45 45 - 50Frequency 4 1 10 10-Grades 7-9Height Range 50 - 55 55 - 60 60 - 65 65 - 70Frequency 11 5 6 3-Grade 4-6Height Range 45 - 50 50 - 55 55 - 60 60 - 65Frequency 12 8 4 1The different variants of a trait available to a gene are called(1 point)-alleles.-genotypes.-polygenic traits.-phenotypes.A wolf populations undercoat thickness follows a normal distribution. Suppose climate change causes the winters to grow colder. Over many generations, the distribution of undercoat thickness in this population will likely(1 point)-shift toward a thinner coat.-shift toward a thicker coat.-remain the same.-no longer be normal.HELPPPP PLEASE....:)
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Need help pls brainless to. Who ever helps
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A6003b Life Sci 7-2SATICmoreWhy are the male and female reproductive systemsimportant?
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A nucleotide is made of three parts. They are: __?__, __?__, and __?__.
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Assignment 1-The cell is the smallest unit of life. All living things are made of cells.A) What are the three principles of the cell theory? And explain each in details.-Present-day mitochondria and chloroplasts probably evolved as a consequence of early endosymbiosis: the ancestor of the eukaryotic cell engulfed a bacterium, and the bacterium continued to function within the host cell.B) What is the Endosymbiont theory? What is the evidence supporting this theory?
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12 Rachel is analyzing a DNA sample to identify its base pairs. Her results show that40% of the sample is adenine. Which other base makes up 40% of the sample?A cytosineC thymineB guanineDuracil
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PLEASE HELP! DUE SOON!!!What statement is true of channel and carrier proteins?A. Channel and carrier proteins always move substances from the side of the membrane with the highest concentration to the side with the lowest concentration.B. Channel and carrier proteins always move substances from the side of the membrane with the lowest concentration to the side with the highest concentration.C. Channel proteins undergo a shape change, while carrier proteins do not.
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Which of the following describes erosion caused by glaciers?(2 points)It forms big ice chunks.It changes the temperature.It happens quickly.It takes a long time.
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A flood is an example of a ________ because it usually affects all populations in the same way
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Which statement about the structure of DNA is NOT true?Long strands of DNA are twisted in the form of a double helix.Long strands of DNA are twisted in the form of a double helix.DNA contains four different nitrogen bases including adenine, guanine, cytosine, and uracil.DNA contains four different nitrogen bases including adenine, guanine, cytosine, and uracil.DNA is made of linked nucleotides which are each made of a sugar, a phosphate and a nitrogen base.DNA is made of linked nucleotides which are each made of a sugar, a phosphate and a nitrogen base.DNA consists of two strands joined together by complementary base pairing.
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how is the mitochondrial DNA (mtDNA) transferred from generation to generation.
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which organelle breaks down sugar molecules that supply energy to the cell
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