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Elan Coil [88]
2 years ago
10

What do cells want to being in and what do cells want to keep out

Biology
1 answer:
PilotLPTM [1.2K]2 years ago
4 0

Answer:

Cell membranes serve as barriers and gatekeepers. ... Small polar molecules, such as water and ethanol, can also pass through membranes, but they do so more slowly. On the other hand, cell membranes restrict diffusion of highly charged molecules, such as ions, and large molecules, such as sugars and amino acids.

Explanation:

Hope it helps :)

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Why are plants and the bottom of the energy pyramid?
nataly862011 [7]

Answer:

What is an energy pyramid?

An energy pyramid is a graphical model that shows energy flow in a community. In this case thought, it shows how energy flows in a biome.  

Why do the percents decrease as you get to the top of the pyramid?  

The plants at the bottom of the pyramid have the most energy because they are the producers of the biome. They take the sun rays and use photosynthesis to make food and turn that into energy for animals. Herbivores have to move around to find their food. Finding food takes energy so that's why they have less amount of energy. Another reason is because they have to chew and swallow their food. Their digestive system has to use energy to break down the food molecules and get the essential nutrients out of the plant for the herbivore. The carnivore has the least amount of energy because they have to track their prey. Moving around requires a lot of energy. Also by the time the carnivore attacks the herbivore, they're already digesting the energy and nutrients from the plants so there's less of those left.

5 0
3 years ago
Read 2 more answers
Which statement describes an advantage of using biometrics for physical access control?
Soloha48 [4]

Answer: a.The individual always has the biometric in their possession.

Explanation:

Biometrics is a term that is used for the technology that is used to measure the bodily features and making a calculation on that basis. It is a method that can be used for the purpose of identification and authentication for the purpose of access control.

Among the given options, a.The individual always has the biometric in their possession. is the correct option. This is because of the fact that biometric measurements can be based upon physical characteristics such as fingerprints, retinal scans, and facial recognition. These features are common and unique to every human being. Hence, biometric system can be advantageous for physical access control.

8 0
3 years ago
____is the amount of matter in an object and is measured in kilograms.
il63 [147K]
Answer is d hope this helps
6 0
3 years ago
Which ones are all nonrenewable resources?
professor190 [17]
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8 0
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It is raining in Little Rock, Arkansas, in the morning. Which state will probably experience rain by the afternoon?
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Little Rock is right in the middle of the state so to figure out where the storm will go next you need the direction of the wind

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2 years ago
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