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3 years ago

According to the theory of punctuated equilibrium at what rate does speciation occur

2 answers:

4 0

On the basis of the theory of punctuated equilibrium, after the periods of stasis, new species evolve comparatively rapidly.

An evolutionary theory, which deals with the concept of stasis, that is, a state of no or little morphological change is known as punctuated equilibrium. It illustrates the pattern of speciation witnessed in the fossil records.

Till the organisms come across an evolutionary pressure, they are in a state of stasis. The evolutionary pressure leads to a brisk process of speciation. After the appearance of the species in the fossil records, the stability of the population takes place will little or no evolutionary change. They further go through minimal or no evolutionary change for the majority of their geological time scale.

irinina [24]3 years ago

3 0

According to the theory of punctuated equilibrium speciation occur at high rate.

Punctuated Equilibrium is a theory about how the evolutionary process works and it describes how species originate rapidly.

Shortly described, punctuated equilibrium can be represented by a group of organisms that get isolated from the rest of their species. They evolve fast, because they are a small group and then they can spread and replace their parent species.

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Which of the following statements is INCORRECT? Which of the following statements is INCORRECT? Mucous membranes line exits and

koban [17]

Answer:

The cutaneous membrane is made of a simple columnar epithelium

Explanation:

Cutaneous membrane is the membrane of the skin. This membrane protects the skin from the physical and chemical damage.

Cutaneous membrane is present on skin and exposed to the external environment. This membrane is made of stratified squamous epithelium and keratinized and consist of the underlying layer of dermis. Hence, the membrane is not made upof simple columnar epithelium tissue.

Thus, the correct answer is option (3).

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2 years ago

What types of bedrock fossils are found in sedimentary rocks?

BARSIC [14]

Answer:

shale, limestone and sandstone.

Explanation:

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2 years ago

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What is d difference between epithelial cells and epidermal cells

ASHA 777 [7]

Answer:

It is the uppermost layer of the three layers of the skin. Summarily, the epithelium is a more general concept, and epidermis is the one type of epithelium, which is a more limited word indicating exterior part of the skin.

Explanation:

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2 years ago

Which response to an injection of ACTH indicates a primary adrenal insufficiency

Keith_Richards [23]

Explanation:

Correct Answer: No change in serum glucocorticoid level

Response Feedback:Primary adrenal insufficiency would be indicated when the adrenal cortex fails to produce cortisol when synthetic ACTH is administered. Serum cortisol levelswould increase following ACTH administration if the adrenal cortex is functioning properly. Primary adrenal insufficiency occurs when there is no change in the serum glucocorticoid level.

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3 years ago

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How might a gene mutation be silent, with no observable effect on a cell or an organism? A. Codons are complementary to anticodo

steposvetlana [31]

Answer:

D. Many amino acids are encoded by multiple codons. A gene mutation that encodes the same amino acid would have no observable effect on the cell or the organism

Explanation:

If gene mutation does not change code (gene still encodes for the same amino acid), the same protein with its function will be produced. This is called synonymous mutation.

Silent mutations might also occur when codon is altered to produce an amino acid with similar function as previous (e.g. leucine to isoleucine) so that the function of protein is not significantly changed.

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2 years ago