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Katena32 [7]
3 years ago
5

What makes up a cell membrane

Biology
1 answer:
AysviL [449]3 years ago
7 0
Cell membranes are mostly made up of lipids (fats)
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How can alleles that cause serious diseases, such as sickle cell disease, still provide an advantage to the human population?
Elden [556K]

Certain alleles may cause serious diseases in a given environment but they may also be beneficial in different environmental conditions. It is a principle of natural selection.

<h3>Natural selection and alleles</h3>

Natural selection refers to the differential survival and reproduction of an organism in a given environment.

Certain alleles such as the allele of sickle cell disease show an evolutionary advantage in specific environmental conditions.

This allele is lethal in homo-zygous individuals, thereby tending to be eliminated from the population.

However, in regions where malaria is endemic, the presence of carriers individual having the sickle cell allele is advantageous to prevent this disease.

Learn more about natural selection here:

brainly.com/question/1657375

7 0
3 years ago
Asexual reproduction requires?
erica [24]

it only requires one parent

6 0
3 years ago
List these events in the correct order for CSF flow in the CNS. a: CSF flows into the arachnoid villi b: CSF enters the blood c:
alex41 [277]

Answer:

E-----> C------>D------->A------->B

Explanation:

The cerebrospinal fluid (CSF) is the fluid of the central nervous system. It allows for buoyancy as the brain is immersed in the fluid, protection, excretion of waste products from the brain and many more. The production of CSF is by the CHORIOD PLEXUS  in the lateral, third and fourth ventricles. The CSF flows through the interventricular foramen from the lateral to the third ventricle and from the third ventricle into the fourth ventricle through the cerebral aqueduct which connects them. The CSF then flows into the subarachnoid space. Absorption of CSF into the blood is by the arachnoid villi and then the CSF enters the blood.

6 0
3 years ago
The DNA in a cell's nucleus encodes proteins that are eventually targeted to every membrane and compartment in the cell, as well
spayn [35]

Answer:

PFK (protein): cytoplasm only (targeting pathway)

Insulin (protein): ER->Golgi->outside cell

Explanation:

Translation can be described as the mechanism by which a protein is produced through a mRNA.

If a particular protein is to function inside the same cell, then it doesn't need to get any modification so that it can travel outside the cell. Such type of proteins are translated on free cytoplasmic ribosomes and are released directly into the cytoplasm to perform their function. For example, PFK protein.

If a protein has to function outside the cell where it is produced, then it has to be modified. Such type or proteins are translated on the rough ER.  They are then modified in the Golgi complex and then transported outside the cell to the area where they have to function. For example, insulin.

6 0
3 years ago
Which statement best describes the path of the paper airplane?
Andrei [34K]

Answer:

a paper plane also known as and paper aeroplane in American English or paper aeroplane in British English is it toy aircraft usually a glider made out the single folded sheet of paper or paper boat a simple noise heavy paper plane truth like a dot is also known as paper

6 0
2 years ago
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