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Lana71 [14]
4 years ago
13

what types of molecules need more help to get through the cell membrane? What helps them get through?

Biology
1 answer:
Slav-nsk [51]4 years ago
7 0
Nonpolar and small polar molecules<span> can pass </span>through the cell membrane<span>, so they diffuse </span>across<span> it in response to concentration gradients. Carbon dioxide and oxygen are two </span>molecules<span> that undergo this simple diffusion </span>through<span> the </span>membrane<span>. The simple diffusion of water is known as osmosis.</span>
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What do you mean by the term,' Weed'?​
Evgesh-ka [11]

Answer:

weed means which feed on plants and takes nutrients from them weed also stops the growth of plant

so we have to uproot weed

8 0
3 years ago
Prader-Willi syndrome is a genetic disorder involving a partial deletion of chromosome 15q on the paternal chromosome. When both
Kay [80]

Answer:

genomic imprinting

Explanation:

Genomic imprinting is a mechanism for regulating gene expression that allows expression of only one of the parental alleles, although both alleles are functional. Unlike most genes in which expression is biallelic, genes that are subjected to this mechanism (imprinted genes) have monoalelic expression; By definition, in an imprinted loci, only one allele is active (maternal or paternal), and the inactive is epigenetically marked by histonic modification and / or methylation of cytosines.

Genomic imprinting can cause some disturbances, among them Prader-Willi syndrome, which is a genetic disorder that involves a partial deletion of chromosome 15q on the paternal chromosome.

3 0
3 years ago
Active and passive humoral immunity are both mechanisms of adaptive immunity that use antibodies. true false
dolphi86 [110]

Active and passive humoral immunity are both mechanisms of adaptive immunity that use antibodies. yes this is true

  • Our adaptive immune system protects us from infection-related mortality. An new-born born with a significantly compromised adaptive immune system may die shortly unless extreme steps are taken to isolate it from a wide range of infectious agents such as bacteria, viruses, fungi, and parasites.
  • The purpose of adaptive immunity is to eliminate invading infections as well as any harmful chemicals they create. Because these reactions are damaging, it is critical that they only occur in response to molecules that are alien to the host and not to molecules that are native to the host. The adaptive immune system's capacity to identify what is foreign from what is self is a fundamental feature.

To learn more about adaptive immune.

brainly.com/question/17094294

#SPJ4

6 0
2 years ago
Women gives birth to a baby boy. A few years later she gives birth to another baby boy. What is the probability that her third c
elena-14-01-66 [18.8K]

Answer:

50 %

Explanation:

It is given that a woman gives birth to a baby boy. Her second child is also a baby boy. Now she is about to give birth to her third child. We have to determine the probability of the child to be a girl.

Here, the probability of the child to be a girl would be 50 % or 1 out of 2.

There are two possibilities and the possibilities would result a boy child or a girl child. So there are two possible outcomes and is equally likely with each child birth.

Also each child birth is an independent event, so the probability that the one results will occur do not depend on the previous births.

5 0
3 years ago
Some bones develop within sheetlike layers of connective tissue, and they are called ______ bones. Other bones develop from a mo
Ugo [173]

Some bones develop within sheet like layers of connective tissue which are called intramembranous bones whereas the bones that are develop from a model of hyaline cartilage and are called endochondral bones.

<h3>Formation of intramembranous bones and endochondral bones</h3>

Endochondral ossification involves the replacement of hyaline cartilage with bony tissue which leads to the formation of endochondral bones whereas, intramembranous ossification refers to the replacement of sheet-like connective tissue membranes with bony tissue which results in the formation of intramembranous bones.

Learn more about bones here: brainly.com/question/412179

5 0
2 years ago
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