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hoa [83]
3 years ago
7

Molecules move in and out freely from high to low concentration

Biology
1 answer:
il63 [147K]3 years ago
6 0
Active Transport - requires chemical energy because the process of transport is the movement of biochemicals from areas of lower concentration to higher concentration.

<span>Passive Transport - does not require energy because the process of transport is the movement of biochemicals from areas of higher concentration to lower concentration. </span>

Types of transport:
Active Transport - endocytosis, cell membrane/sodium-potassium pump and exoctyosis

Passive Transport - diffusion, facilitated diffusion, and osmosis.

Types of particles transported:
Active Transport - proteins, ions, large cells, complex sugars

<span>Passive Transport - anything soluble in lipids, small monosaccharides, water, oxygen, carbon dioxide, sex hormone, etc.</span>
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Nervous system found in simpler animals like jellyfish.
Flura [38]
<span>The answer is nerve net.

Jellyfish has a nerve net that surrounds its whole body. It makes a series of interconnected neurons that form net-like structure. This net surrounds the whole body of the jellyfish. Some jellyfish may have sensory structures, motor nerve net, and diffuse nerve net. Sensory structures receive environment signals and send them through diffuse nerve net to motor nerve net that activates muscle contractions.</span>
7 0
3 years ago
When farmers irrigate their crops, as much as 60 to 70 percent of the water _____.
nata0808 [166]
Never reaches the crops.


Hope this helps!
6 0
3 years ago
Read 2 more answers
What do you understand by the statement" you are what you eat?
Bad White [126]

Answer:

protein,carbohydrate,lipids,nucleic acid

7 0
3 years ago
The particles that make up matter always in what?
vampirchik [111]

Answer:

The Kinetic Theory of Matter

The states that all of the particles that make up matter are constantly in motion. As a result, all particles in matter have kinetic energy. The kinetic theory of matter helps explain the different states of matter—solid, liquid, and gas.

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3 0
3 years ago
What are the chromosomes called when they look like Xs​
Marina86 [1]

Answer:

I think you're referring to the Metaphase...

Explanation:

During Cell Division (or, rather before!) the DNA needs to be replicated. This normally is done by DNA Polymerase, and results in two identical double strands (the "Sister Chromatids".

These chromatids are held together at the Centromere, which will be the heart of the "X"-shape. After that the DNA is packed into Chromosomes by winding it around proteins called Histones. If I remember correctly there are 5 different Histones.

This "Zipping Up" makes the chromosomes more visible.

As the two sister chromatids are still connected, the result is the X-shaped Metaphase Chromosome....

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