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Arte-miy333 [17]
3 years ago
8

According to the tree, turtles are more closely related to mammals than to birds. Question 11 options: A) TRUE, because turtles

share a common ancestor, W, with mammals. B) TRUE, because turtles are closer to mammals in the tree. C) TRUE, because the ancestor of turtles (W) is connected to the ancestor of mammals (N), whereas the ancestor of birds (P) is separated by one ancestor (C). D) FALSE, because turtles share a more recent common ancestor with birds than with mammals. E) FALSE, because turtles are much more primitive than mammals.
Biology
1 answer:
nalin [4]3 years ago
7 0

Answer:

D) FALSE, because turtles share a more recent common ancestor with birds than with mammals

Explanation:

There is much evidence about the genetic relationship between birds and reptiles, some physiological, such as the fact that both excrete uric acid and the circulatory system of birds is very similar to that of crocodiles, for example.

In addition, both lay eggs and in them there is the internal amniotic fluid, which nourishes the embryo.

Much scientific research indicates that the birds are related to prehistoric reptiles that had feathers, elongated claws and some also had the ability to fly.

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Question 7(Multiple Choice Worth 4 points)
Maurinko [17]

Answer: The correct option is B (self-replicating molecules, such as RNA and DNA)

Explanation:

The current theory of the process of evolution makes use of present day knowledge of genes and chromosomes to explain the source of genetic variation upon which natural selection works. These genes are discrete units of inheritance which determine hereditary characteristics. All the information for the inheritable characteristics of an individual are contained in these genes.

When a cell divides, the genes duplicate themselves so that each daughter cell has an identical set of genes as the original parent cell. These genes are passed from parents to offspring in the gametes of the parents.

Gene are found in the DNA( Deoxyribonucleic acid) molecules or RNA (Ribonucleic acid) molecules. These molecules are capable of self replication due to a process called mutation. Mutations are random changes in DNA that alter genetic information and sin introduce new characteristics. They may occur

--> in body cells or

--> during gamete formation.

Thus, evolution from vesicles to true cells is through self replicating molecules through the process of mutation which is the raw material for evolution

8 0
3 years ago
Samuel ate some vegetable soup. What process is at work to allow Samuel to break down the soup so that his body will be
Andru [333]

Samuel ate some vegetable soup. <u>Digestion</u> process is at work to allow Samuel to break down the soup so that his body will be  able to produce energy.

<u>Option: D</u>

<u>Explanation:</u>

There are majorly four steps in food processing in human body, these are ingestion, digestion, absorption and elimination. There are six major phases covered by digestion: ingestion, acceleration, mechanical or physical digestion, chemical digestion, absorption and defecation. The first of these procedures, ingestion, relates to the absorption of food via the mouth into the food canal.

Digestive system allow the transformation of massive insoluble food molecules into small water-soluble food components to dissolve them into the watery plasma of the blood. Many smaller particles are ingested into the bloodstream in certain species through the small intestine.

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Cyclin B1, a key cell cycle regulatory protein in vertebrates, is mostly cytosolic before mitosis. Early in mitosis, however, th
Ludmilka [50]

Answer:

Phosphorylation within the nuclear export signal interferes with the function of the  signal.

Explanation:

In biochemistry, phosphorylation is the addition of a phosphate group (PO4) to a protein or other molecule. Phosphorylation is a major player in protein regulation mechanisms, preventing protein-catalyzed reaction product from accumulating in the body causing problems.

However, in some cases phosphorylation may cause nuclear accumulation of a protein in the nucleus of the cell. An example of this is the protein shown in the question above. In this case, phosphorylation in the nuclear export signal interferes with the signal function, resulting in protein accumulation in the nucleus.

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