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abruzzese [7]
3 years ago
9

When artery muscles contract, _____.

Biology
1 answer:
quester [9]3 years ago
6 0
<span>the opening becomes smaller, and less blood flows through

When the artery contracts, it gets tighter and smaller.  Since there is less space, less blood flows through.</span>
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What are three ways a synthetic polymers affect the environment
nadezda [96]
There are two types of polymers, which are natural and synthetic. Although natural polymers do not affect the environment, synthetic polymers do.Synthetic polymers are anything that is manufactured or influenced by humans. Due to this, these types of polymers release reactants which are hazardous; both to humans and the environment.Synthetic polymers, which include plastics, rubber, How do polymers effect the environment?adhesives, and Styrofoam cannot be degraded into the environment, causing a buildup of these chemicals all at once, causing a release of any "excess" chemicals into the environment.From there on, polymers create garbage loads, and chemical reactants that effect the environment, and spread around. Therefore effecting anything grown or eaten around it. This could call chemical poisoning to the greenery, animals, and living organisms around it. Not all polymers are bad. In fact humans are made up of polymers. But polymers from sources such as crude oil synthesized into plastics release toxins as they break down. When you burn plastics synthesized from crude oil feedstock, carbon dioxide and dioxins can be released into the air if smoke is not properly <span>What are the bad effects of polymers on your environment?filtered as they are in high quality waste-to-energy incinerators. Also plastics </span>are non biodegradable and so landfills are used to bury the plastic this takes up space and also costs money because there is not enough room for all the <span>waste. Therefore plastics are banned in some areas.

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3 0
3 years ago
Read 2 more answers
Which structure is labeled X in the diagram below?
Vladimir [108]

Answer:

Option D

Explanation:

Diagram is attached.

Capsid protein is a form of structural protein which usually forms part of a complex which later produces protective shell around the nucleic acid in a virus. It is also referred to as coat protein or head protein.  

Capsid acts as a distinguishing feature for identifying an integrated viral genome, plasmids and other genetic material of viruses. In fact, viruses are termed as organisms that encode capsid proteins.  

Hence, option D is correct

4 0
3 years ago
Long chains of amino acids that determine virtually everything about a cell, including cell structure and function, cell materia
Julli [10]

Answer:

Proteins

Explanation:

Protein describes any of the numerous large, complex naturally-produced molecules made up of one or more long chains of amino acids, in which the amino acid groups are held together by peptide bonds.

8 0
3 years ago
Why do you think DNA evidence is so important in many court cases?
irinina [24]

Answer: DNA can be used to identify criminals with incredible accuracy when biological evidence exists.

Explanation:

In cases where a suspect is identified, a sample of that person's DNA can be compared to evidence from the crime scene. The results of this comparison may help establish whether the suspect committed the crime.

No Problem at all!

7 0
2 years ago
Read 2 more answers
If a population with two alleles is at Hardy-Weinberg equilibrium ad the frequency of one allele is 0.7, what is the heterozygot
Vinil7 [7]

Answer:

B. 0.42

Explanation:

Since the two alleles are at Hardy-Weinberg equilibrium, the sum of the frequency of two alleles will be one. If the frequency of a dominant allele is "p" and that of the recessive allele is "q", then p+q=1

According to the given information, the frequency of one allele in the population is= 0.7

This means that the frequency of the other allele would be= 1-0.7 = 0.3

Frequency of heterozygote in the population =2pq = 2 x 0.7 x 0.3 = 0.42

4 0
3 years ago
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