BIOLOGY HIGH SCHOOL

Mutations are rare and occur because of?-An error in DNA replication
-natural event such as an earthquake
-Migration of organisms to a new population

Answers

Answer 1
Answer: Mutations result from an error in DNA replication, should it be from an alien source (like radiation) or simply a mistake in replication. Migration of organisms to a new population would alter the DNA by adding new genes, but it would not mutate them.
Answer 2
Answer:

Answer:

An error in DNA replication

Explanation:

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If a personality survey with high internal consistency includes two different questions related to the personality dimension of agreeableness, then which of the following is true?A.It is impossible to predict how people will answer the second question based on how they answered the first question.B.If people give an extreme answer to the first question, they will tend to give the opposite extreme answer to the second question.C.People will tend to give dissimilar answers to both questions.D.People will tend to give similar answers to both questions.E.If people give a moderate answer to the first question, they will tend to give an extreme answer to the second question.

Which best describes the purpose of the European Union?A. to help foster peace and economic collaboration among European nations
B. to protect Europe from invasion by foreign countries
C. to create ethnic and political divisions within Europe
D. to assist with the reunitification of Germany

Answers

"To help foster peace and economic collaboration among European nations" is the one among the following choices given in the question that best describes the purpose of the European Union. The correct option among all the options that are given in the question is the first option or option "A". 

The nutritional information on a cereal box shows that one serving of a dry cereal has 200 kilocalories. If a person were to ignite one serving of the cereal in a bowl, the amount of heat given off would be sufficient to raise the temperature of 20 kg of water how many degrees Celsius

Answers

Answer:

10°C.

Explanation:

Heat released in any system can be calculated as follows:

Heat released = m c DT

Here, m is the mass , c is the specific heat and DT is the change in temperature.

Heat released = 200 kcalories = 200,000 calories

The mass of water = 20 kg = 20000 g

The specific heat of water = 1 cal / g degree

The rise in the temperature is as follows:

heat released = m c DT

200,000 = 20,000 ( 1) (DT)

DT = 10°C.

Thus, the answer is 10°C.

Which was one of the first animals to develop a true body cavity?

Answers

The answer is mollusks and annelids.

Coelomates are animals which body cavity (coelom) is filled with fluid. Fluid surrounds organs, protects them and allows their free movement and growth. All vertebrates and some invertebrates, such as mollusks, annelids, and arthropods, are coelomates.

Differentiation switches certain genes on and off to create specialized cells. true false

Answers

Its true, differentiation switches certain genes on and off to create specialized cells. 

Which of the following statements about signal deactivation is false?A. Hormone response systems respond to very small changes in hormone concentration.

B. Second messengers are short-lived because cytoplasmic enzymes convert them to their inactive forms.

C. When G proteins hydrolyze GTP to GDP, they become inactive and halt production of second messengers

D. Phosphatases terminate phosphorylation cascades by adding phosphate groups to proteins in the phosphorylation cascade.

Answers

The statement- "Phosphatases terminate phosphorylation cascades by adding phosphate groups to proteins in the phosphorylation cascade." is false. option D is correct.

In a phosphorylation cascade, protein kinases, the phosphorylate proteins and protein phosphatases dephosphorylate them.

For a phosphorylation cascade, the source of phosphate is ATP (adenosine triphosphate). In a phosphorylation cascade, a phosphate group is transferred from ATP to a protein, which activates or deactivates the protein, depending on the specific cascade.

This  process in which phosphate group is transferred from ATP to protein is carried out by enzymes which are known as protein kinases.

Thus, option D is correct.

To know more about phosphorylation here

brainly.com/question/31712792

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Answer:Phosphates terminate phosphorylation cascades by adding phosphate groups to proteins in the phosphorylation cascade.

Explanation:

User: the slaughter of european civilians particulary european jews by the nazis became known as the ??A.cold war .B.great atrocity.c. vast massacre.
d. holocaust.

Answers

The correct answer is letter D. Holocaust. The slaughter of European civilians particularly European Jews by the Nazis became known as the holocaust. The holocaust is known as Shoah. It was a genocide during Adolf Hitler's Nazi time in Germany, together with other collaborators. They killed about six million Jews.
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