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SVETLANKA909090 [29]
3 years ago
8

The earliest humanlike creatures that lived in africa three to four million years ago were

Biology
1 answer:
pashok25 [27]3 years ago
5 0
I believe the answer you are looking for is or are marsupials..
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Diffusing molecules move ________ until they are ________. Through channels of active transport proteins; evenly distributed up
koban [17]

Answer;

-Down the concentration gradients; evenly distributed

Diffusing molecules move down the concentration gradients until they are evenly distributed.

Explanation;

Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration.

-Whenever a substance exists in greater concentration on one side of a semipermeable membrane, such as cell membranes, any substance that can move down its concentration gradient across the membrane will do so. If the substances can move across the cell membrane without the cell expending energy, the movement of molecules is called passive transport.

-The mechanism of molecules moving across a cell membrane from the side where they are more concentrated to the side where they are less concentrated is a form of passive transport called simple diffusion.

4 0
4 years ago
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Which is an important difference between light-dependent (L-D) and light-independent (L-IND) reactions in photosynthesis? The L-
Yuliya22 [10]

Answer;

The L-D reactions require light energy and water, and the L-IND reactions require ATP, NADPH and CO2.

Explanation;

-Photosynthesis is the process by which green plants use light energy from the sun, water and carbon dioxide to make organic molecules, such as simple sugars.

-The process takes place in two phases; light dependent stage and light independent stage.

-During light dependent stage light energy is used to break down water molecules into hydrogen ions and oxygen atoms.

-Light independent reactions uses CO2 and the ATP and NADPH from light dependent reactions to produce sugar/ glucose. ATP is used to provide the energy for sugar synthesis and NADPH is used for electrons in the reduction of Carbon Dioxide into sugar.


6 0
3 years ago
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Can someone help me with this thing ❤️​
Marta_Voda [28]
1. homeostasis
2. negative feedback loop
3. the hypothalamus
4. the body’s optimal temperature, which is 37 degrees C, or 98.6 F
5. humans are endothermic, which means they don’t completely rely on their environment for heat, unlike ectothermic organisms such as reptiles. the diagram shows that the brain is in control of the body’s temperature, and that the body can raise its own temperature in its blood.
or something like that, hope this helped
3 0
3 years ago
Does sugar molecules provide all elements needed to make four types of macromolecules?
fomenos

Answer:

No, If that was the case, then we should only be eating carbohydrates.

8 0
3 years ago
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What is the difference between food chains, food webs, and energy pyramids?
marshall27 [118]
Food chain is a hierarchical series of organism each dependent on the next as a source of food while a food web is a system of interlocking and interpendent food chains. on the other hand, energy pyramid as a graphical model of energy flow in a community.
5 0
3 years ago
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