BIOLOGY MIDDLE SCHOOL

Which group of fish do scientists believe amphibians evolved from?

Answers

Answer 1
Answer:

Answer:

Amphibians evolved during the middle of the Devonian period (416 to 359 million years ago) from the lobe-finned fish of the vertebrate class Sarcopterygii. Species within the genus Ichthyostega (members of the Labyrinthodontia subclass) are considered by some scientists to be the earliest amphibians.

Explanation:

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Info: Sorry, designs are down the bot was infiltrated Two ways in which the original bodies of a fossil have been preserved: trapped in _____ or _____.

What roles does estrogen play in the feedback mechanism?

Answers

Answer:

Estrogen is a steroid hormone which is required for the maintenance of female characteristics of the female body released by the follicle and corpus luteum of ovary.

They act in females through hormone cascade or sequential action of hormones which are controlled by feedback cycles either in a positive cycle or negative ways.

This hormone is associated with the follicular phase of menstruation as:

1. Negative feedback mechanism- estrogen influence pituitary gland to decrease the production of follicle stimulating hormone (FSH) which stimulate the ovary to produce estradiol.

2. Positive feedback mechanism- occurs near the end of the follicular phase estrogen which causes the anterior pituitary gland to release more FSH.

Thus, estrogen act by both positive and negative feedback mechanism.

How many calories does tali’s have

Answers

250 calories in a small bag

150 calories per serving

Pretty sure they have 36 calories per a tbsp.

Where are the chromosomes of most organisms located?

Answers

Enclosed within the nucleolus of the cell.

Chromosomes are located within the nucleus of a cell.

The Shorthorn breed of cattle carries the gene WW for white coat color, and the gene ww for red coat color. When a white individual is bred with a red individual the hybrid result is a roan Ww that has a mixture of red and white coat color. Part A What is the dominance pattern for the roan color? Part B How does the roan color come about?

Answers

geo wild card spot on my a open relationship between the two of you are not up for

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Which of the following statements is true?

All mutations are harmful.
Mutations are the only way to add new genes to a gene pool.
In substitution, DNA base pairs are deleted or lost during replication.
A mutation in the liver cell of a cat will be inherited by the cat's offspring.

Answers

(C)
ln substitution, DNA base pairs are deleted or lost during replication

Answer:

Mutations are the only way to add new genes to a gene pool.

Explanation:

In terms of weather, what kind of boundary does the line labeled X represent? A.
occluded front

B.
stationary front

C.
cold front

D.
warm front

Answers

I think it would be cold front ^^, I hope it helps!
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Which best describes the difference between osmosis and diffusion? Osmosis is the movement of particles from a high to a low particle concentration, while diffusion is the movement of water from a high to a low water concentration.Diffusion is the movement of particles from a high to low particle concentration, while osmosis is the movement of water from a high to a low water concentration.Diffusion is the movement of particles from a low to a high particle concentration, while osmosis is the movement of water from a low to a high water concentration.Osmosis is the movement of particles from a low to a high particle concentration, while diffusion is the movement of water from a low to a high water concentration.
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