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AlekseyPX
3 years ago
5

Why a molecule may not be to pass into or out of a cell

Biology
1 answer:
kari74 [83]3 years ago
7 0
All cells have selectively permeable membranes, which means that they let important molecules inside the cell while leaving other ones outside. Important molecules go inside the cell by the process of diffusion or osmosis. 
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Which hip bone forms the superioir part of the pelvic girlde that extends upward from the acetabulum
Mars2501 [29]

The ischium bone forms the superior part of the pelvic girdle.

<h3>What is the structure of the pelvic girdle?</h3>

In the bottom region of the trunk, there is a bony structure known as the pelvic girdle that resembles a ring. It joins the lower limbs to the axial skeleton. There are two types of pelvises: the bigger pelvic and the lesser pelvis.

The pelvis is made up of two paired hipbones that are joined at the pubic symphysis in front and by the sacrum in back. Each hipbone is composed of three bones: the blade-shaped ilium above and to either side, which determines the hips' width; the ischium below, on which the weight is placed when sitting; and the pubis in front. Early in maturity, all three come together at a triangle suture in the acetabulum, the cup-shaped socket that connects to the head of the femur to create the hip joint.

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3 0
2 years ago
Food web is many over lapped food chains in an ecosystem<br>true <br>or false​
g100num [7]
True.
Overlapping food chain is a food web. A food web shows the many different paths plants and animals are connected. eg: A hawk might also eat a mouse, a squirrel, a frog or some other animal.
7 0
3 years ago
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During elongation, RNA polymerase has three prominent channels, or grooves. These channels provide sites for all of the followin
kirill [66]

Answer:

<h2>A site for the exit of the diphosphates removed from the nucleotide triphosphates.</h2>

Explanation:

Transcription occurs in three steps, i) initiation, ii) elongation, and iii) termination.

Elongation: during elongation , the RNA polymerase add new nucleotides in the growing chain of RNA molecule until it encounter terminator factor, or until it terminate transcription.  RNA polymerase has three prominent channels, i) channel for entry of DNA template strand, ii) channel for exit of DNA strand  and iii) channel for exit of newly synthesized RNA molecule. There are lots of other enzymes which helps in transcription.

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cricket20 [7]
I think it is  b
<span>Amphibia, Reptilia, Aves, and Mammalia</span>
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The amount of a harmful chemical to which a person is exposed to, is  also known as response.
Kitty [74]

Answer:

True.

<em>I think..</em>

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3 years ago
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