BIOLOGY HIGH SCHOOL

The arctic fox is blue-gray in the summer and white in the winter. What most likely influence(s) this change? A. codominant alleles B. dominant alleles C. the environment alone D. genes and the environment

Answers

Answer 1
Answer: D. Genes and the environment. The Arctic fox changes it's fur color for camouflage and protection purposes (Hunting prey and Hiding from predators).
Answer 2
Answer:

Answer:

It is D. Genes and the environment.

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How many possible codons exist in the genetic code? a. 3 b. 20 c. 46 d. 64
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Actions that are reactions to a stimulus are called _____________________.

Answers

The answer is reflex actions.

A reflex action is an involuntary and rapid reaction to a stimulus. So, when a receptor detects a stimulus, the information is sent to relay neuron through a sensory neurone. Relay neuron sends information to the effector through a motor neurone and effector produces a response.

Charles Darwin was credited for writing the biological theory of __________________. The organisms that were used for the basis of his studies were ___________________.these are the answer choices
A) evolution by natural selection, sweet peas
B) inheritance by independent assortment, sweet peas
C) evolution by natural selection, Galapagos finches
D) inheritance by independent assortment, Galapagos finches

Answers

Correct answer: C). Evolution by natural selection, Galapagos finches  

Charles Darwin gave the theory of natural selection in the year 1835 when he visits Galapagos Islands.

There he found several species of finches are adapted to different environmental niches. They have a different shape of the beak, food source they eat and the way they captured the food.

He observes that species vary from island to island, and based on these observations he gave the theory of natural selection.
The answer is C. He observed how the birds' beak sizes affected their ability to compete for food. 

The following DNA fragment was isolated from the beginning of a gene. G G G A T G C G G A A A G T C C A A
C C C T A C G C C T T T C A G G T T


Determine which strand is transcribed, indicate the polarity of the two DNA strands, and then give the sequence of bases in the resulting mRNA and its polarity.

Answers

A strand that is transcribed is called a template strand, the other one is called a coding strand. The template strand is in 3'-5' direction, and the coding strand is in 5'-3' direction. mRNA is transcribed from 3'-5' template DNA strand, so it is in 5' to 3' direction. The first codon of mRNA is called start codon and usually it is AUG.

Knowing this, we can answer the questions:

The transcribed strand must contain three nucleotide sequence complementary to AUG codon. According to the base pairing rules, it must be TAC. The strand that contains TAC, and, thus, is transcribed is
C C C T A C G C C T T T C A G G T T.
This template strand is in 3'-5' direction and the other one is 5'-3'.
mRNA transcription begins from the DNA sequence complementary to AUG codon:
DNA sequence:    3' C C C T A  C G C C T T  T C A G G T T 5'
mRNA sequence:         5'  A U G C G G A A A G U C C A A 3'
mRNA sequence is in 5'-3' direction.

What statement best describes the relationship between heat and temperature

Answers

You didn't give any statements but, temperature is the measure of the amount of heat in a substance or object. Heat is a form of energy associated with the movement of atoms and molecules in an object. 

The ph at which 50 percent of the daphnia survive after 2 hours of exposure can be predicted from the data. this ph is closest to

Answers

4.5 is the answer this phbis closest to 4.5

Which is an advantage to using nonrenewable resources

Answers

The main advantages of non-renewable energies is that they are abundant and affordable. For example, oil and diesel are still good choices for powering vehicles. Non-renewable energy is cost effective and easier to product and use. According to National Geographic, there are reservoirs of non-renewable energy sources throughout the world. Hope this helps!

Final answer:

Nonrenewable resources like oil, natural gas, and coal are efficient and economically viable due to established infrastructure. However, they have environmental impacts and are finite.

Explanation:

The question asks about the advantages of using nonrenewable resources. Nonrenewable resources such as oil, natural gas, and coal, have several advantages. One significant advantage of nonrenewable resources is their efficiency. These types of resources are often much more efficient in generating energy than renewable alternatives. For example, a small amount of coal or nuclear energy can produce substantially more energy than solar or wind power. Furthermore, nonrenewable resources are currently more economically viable. The infrastructure for extracting and using these resources is well established, making them cheaper to use in the short term as compared to renewable sources. However, we need to be aware of the environmental impact and the fact that these resources are finite and will eventually run out.

Learn more about Nonrenewable Resources here:

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