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Ivenika [448]
3 years ago
7

Charles Darwin predicted that tetrapods evolved from ______.

Biology
1 answer:
andriy [413]3 years ago
5 0
Charles Darwin predicted that tetrapods evolved from... to basically sum it up into one word. fish.
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How are things transported through the membrane
AlladinOne [14]

Answer:

The mechanisms of transport across the cell membrane are as follow: 1- simple diffusion, 2- facilitated diffusion, 3- primary active transport and 4-secondary active transport

Explanation:

The cell membrane is a selectively permeable structure capable of transporting substances by different mechanisms. Simple diffusion is a type of passive transport (i.e. does not require energy) where non-polar molecules (e.g. O2, CO2) pass across the membrane by a process that does not require energy from the cell. Facilitated diffusion is another type of passive transport where larger polar molecules (e.g., glucose and amino acids) pass across the membrane by using specific transmembrane integral proteins. On the other hand, primary active transport is a type of active transport that uses chemical energy (e.g., ATP) to move substances such as metal ions (Na+, K+, Ca2+) across the cell membrane against their concentration gradient. Finally, secondary active transport is another type of active transport where transporter proteins are used to couple the movement of ions (e.g., H+ protons) down their electrochemical gradient to the transport of another ions/solutes against their concentration/ electrochemical gradient.

6 0
3 years ago
Blank is the term used to describe the removal of sand and soil by the wind
zloy xaker [14]

Answer:

erosion and I will copy and paste why if you need that too

In earth science, erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location (not to be confused with weathering which involves no movement). Hope you get it right good luck!

4 0
3 years ago
The parts of the brain implicated in adhd, such as the prefrontal cortex and the basal ganglia, feature large amounts of ____ ac
bulgar [2K]

Answer:

The correct answer is A. dopamine.

Explanation:

Stimulants are believed to work by increasing dopamine levels in the brain. Dopamine is a neurotransmitter associated with motivation, pleasure, attention, and movement. For many people with ADHD, stimulant medications boost concentration and focus while reducing hyperactive and impulsive behaviors.

8 0
3 years ago
Read 2 more answers
Starch is a _____.<br> A) monosaccharide<br> B) disaccharide<br> C) hormone<br> D) polysaccharide
muminat
<span>it is a polysaccharidee </span>
4 0
3 years ago
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If air pressure is getting lower what would happen to torricelli's mercury barometer?
Tcecarenko [31]
It will get lower since the pressure around the barometer gets lower

7 0
3 years ago
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