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Neko [114]
2 years ago
11

1. All eukaryotic cells contain small structures called

Biology
1 answer:
ozzi2 years ago
4 0

Answer:

oganelas

Explanation:

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Which two factors of a molecule determine whether or not it can cross the membrane? A. Color and weight B. Shape and texture C.
myrzilka [38]
D. Polarity and size. 
<span>The size, polarity, and charge of a substance will determine whether or not the substance can cross the cell membrane by diffusion. The cholesterol was an example of a lipid, and is highly soluble in the nonpolar environment of the lipid bilayer. You saw, in the animation above, the cholesterol freely passing into the hydrophobic environment of the membrane. Cholesterol distributes freely in the membrane and then some fraction will dissolve in the aqueous environment of the cytoplasm. Water, on the other hand, while polar, is small enough to cross the membrane at a slow rate. Note that specialized transport proteins in certain cell membranes can provide a channel for the water, greatly increasing its rate of crossing the membrane. The lipid bilayer is much less permeable to the ion, because of its charge and larger size. As a general rule, charged molecules are much less permeable to the lipid bilayer.</span>
4 0
3 years ago
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Why does it benefit an imperial shrimp to travel on a sea cucumber?
olasank [31]

Answer:

the imperial shrimp and the sea cucumber have what's referred to as a one sided symbiotic relationship. that's a type of relationship where there's two organisms, but only one of those organisms benefit. the other organism isn't helped, but it isn't hurt, either.

<u>an imperial shrimp benefits from its relationship with the sea cucumber because the shrimp, when hungry, can get a lift on his lil friend the sea cucumber and is dragged around the ocean to where there's food for shrimp to eat :)</u>

<em>~hope i helped ouo have a nice rest of ur day~</em>

<em>lots of love, </em>

<em> lee</em>

7 0
3 years ago
Pls hurry im doing an exam Four groups of students plan scientific investigations to answer four questions for the science fair.
mafiozo [28]

Answer:

The correct option is 3

Explanation:

An experimental investigation would require an hypothesis, aim, methodology, results, discussion and conclusion.

The third option can be easily answered using the "requirements" above.

The hypothesis (null hypothesis) would be different types of grass do not affect how far a ball rolls

The aim would be to determine the effect of different types of grass on the movement of a ball

The methodology would involve identifying several playing grounds with different grasses and then rolling the ball with a constant force on the different grasses and then determining the eventual speed and distance traveled by the ball on those grasses which would serve as the results. Inferences can then be made from this results and then conclusions drawn subsequently.

7 0
2 years ago
Electrical wires are generally protected by a tube of plastic. a similar insulating function is performed in the nervous system
Allisa [31]

The myelin sheath is the protective layer, which is present in the outer layer of the neural cells. This myelin sheath prevents the loss of electrical impulses, which are being conducted in the neurons. This also act as an insulator between neuron and its external environment.

This layer is mainly made up of the protein and fatty substance. The degeneration of the myelin sheath result in many neurological disorders.


Hence, the correct answer is myelin sheath.

7 0
3 years ago
Do animals have a crush on humans ?
nexus9112 [7]

Answer:

May be yes

Explanation:

They may have a crush on humans.

6 0
2 years ago
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