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blagie [28]
3 years ago
5

Which group of fish do scientists believe amphibians evolved from?

Biology
1 answer:
Alex73 [517]3 years ago
4 0

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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Please help answer all 3!!! Best answer will get Brainliest and 25 points!!
Dafna1 [17]

Answer:

a) genotypic ratio= 1:1

phenotypic ratio= 2 black: 2 white

b) genotypic ratio= 1

phenotypic ratio= all plants will have green pod colour

Explanation:

<u>problem 2:</u>

W w

w Ww ww

w Ww ww

genotypic ratio= 1:1

phenotypic ratio= 2 black: 2 white

<u>problem </u><u>3</u><u>:</u>

G g

G GG Gg

G GG Gg

genotypic ratio= 1

phenotypic ratio= all plants will have green pod colour

hope it helps!!

7 0
2 years ago
Aftet leaving the small intestine, where does undigested waste travel to and what happens there?
iris [78.8K]

After the food moves through the small intestine it enters the large intestine. The large intestine is named for the diameter of the cavity and not for the length. It is actually much shorter than the small intestine. The role of the large intestine is to remove any extra water from the digested material before it is finally excreted.

8 0
3 years ago
The term for a line that is perpendicular to a surface
pishuonlain [190]

Answer:

A normal line

Explanation:

"In geometry, a normal is an object such as a line, ray, or vector that is perpendicular to a given object."

Hope this Helps

4 0
2 years ago
Identify a signal the brain sends out after the nervous system sends the signal that pH has dropped.
spin [16.1K]

In response to a notification of a <u>decrease</u> in blood pH by the nervous system, the brain sends signals to the external intercostal muscles and the diaphragm.

<h3>What is blood pH?</h3>

Blood pH can be defined as a measure of the molar concentration of hydrogen ions that are present in the blood of a living organism, with respect to its acidity, neutrality or alkanlity (basicity).

In response to a notification of a <u>decrease</u> in blood pH by the nervous system, the brain would send signals (impulses) to the external intercostal muscles and the diaphragm through its respiratory center, so as to help the living organism increase its breathing rate and the volume of its lungs during inhalation.

Read more on blood pH here: brainly.com/question/11209525

6 0
2 years ago
Im crying because im so in a hurry help me fastas you can in this science question.
eimsori [14]
Energy convention: Convection is the motion of a fluid driven by temperature differences across that fluid. When a fluid is heated, the region in closest contact with the heat source becomes less dense due to increased kinetic energy in the particles. Convection is one of the fundamental ways that heat is transferred
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3 years ago
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