All categories

2 years ago

NEED ANSWER ASAP!!

Biology

1 answer:

____ [38]2 years ago

7 0

Answer:

I'm pretty sure it's a comet!

Explanation:

A comet's nucleus is like a snowball made of ice. As the comet nears the Sun, the ice starts to melt off, along with particles of dust. These particles and gases make a cloud around the nucleus, called a coma. A comet's nucleus, or heart, is the solid chunk of something in the center of its fuzzy coma.

Most comets have two tails. ... Because the comet dust particles are so small, they are pushed away from the Sun into a long tail. Another tail is made of electrically charged molecules of gas (called ions). Very rarely a comet will have a third tail made of sodium, which we usually don't see with our unaided eyes.

Very sorry if this is incorrect, I hope this helps!

~Kweenie~

You might be interested in

How many factors should a well-designed experiment test at one time?

LuckyWell [14K]

Only 1- the experiment can not show a cause and effect relationship if there are more than one factors contributing to the outcome.

3 0

3 years ago

A food chain has four trophic levels. The fourth level has 10 hawks that are a natural predator to the snakes in the ecosystem.

jok3333 [9.3K]

A 1000

idk i could be wrong im on my cousin phone rn

8 0

3 years ago

A) Compare and contrast diffusion, passive transport (diffusion & facilitated), primary active transport and secondary activ

zheka24 [161]

Answer:

Passive transport: It does not need any energy to occur. Happens in favor of an electrochemical gradient. Simple diffusion and facilitated diffusion are kinds of passive transport.

Simple diffusion: molecules freely moves through the membrane.

Facilitated diffusion: molecules are carried through the membrane by channel proteins or carrier proteins.

Active transport needs energy, which can be taken from the ATP molecule (Primary active transport) or from a membrane electrical potential (Secondary active transport).

Explanation:

Diffusion: This is a pathway for some small polar hydrophilic molecules that can freely move through the membrane. Membrane´s permeability depends on the size of the molecule, the bigger the molecule is, the less capacity to cross the membrane it has. Diffusion is a very slow process and to be efficient requires short distances and pronounced concentration gradients. An example of diffusion is osmosis where water is the transported molecule.

Facilitated diffusion: Refers to the transport of hydrophilic molecules that are not able to freely cross the membrane. Channel protein and many carrier proteins are in charge of this passive transport. If uncharged molecules need to be carried this process depends on concentration gradients and molecules are transported from a higher concentration side to a lower concentration side. If ions need to be transported this process depends on an electrochemical gradient. The glucose is an example of a hydrophilic protein that gets into the cell by facilitated diffusion.

Simple diffusion and facilitated diffusion are passive transport processes because the cell does not need any energy to make it happen.

Active transport occurs against the electrochemical gradient, so it does need energy to happen. Molecules go from a high concentration side to a lower concentration side. This process is always in charge of carrier proteins. In primary active transport the energy needed comes from the ATP molecule. An example of primary active transport is the Na-K bomb. In secondary active transport, the energy comes from the membrane electric potential. Examples of secondary active transport are the carriage of Na, K, Mg metallic ions.

7 0

3 years ago

Not all members of a species are the same. Every species exhibits__. __, like eye color, are passed from parent to offspring.

rodikova [14]

Variations, traits

Not all members of a species are the same. Every species exhibit variations. Traits, like eye color, are passed from parent to offspring.

Genetic variation is the subtle differences in the DNA sequence in each individual’s genomes. Genetic variation results in various forms or alleles of genes that determines distinct traits such as eye color, skin color, shape of face, and hair color that can be passed on from parents to offspring.

3 0

2 years ago

Read 2 more answers

Which type of microscope is used to view very small cell components like proteins and DNA?

Hitman42 [59]

What are the 4 choices

4 0

3 years ago

Read 2 more answers