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Oksanka [162]
3 years ago
5

many pathogenic bacteria species are becoming resistant to antibiotics. Explain how such adaptations can develop through the pro

cess of natural selection
Biology
1 answer:
mihalych1998 [28]3 years ago
5 0
There may be some strains of bacteria that are naturally resistant to these antibiotics, or there may be some that mutate to become resistant. This means that as antibiotics are used more and more, those that can be killed using the antibiotics die out, but those that are resistant will remain, and will reproduce. Over time, it will be the resistant species that predominate.
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The _____ theory of dreaming proposes that dreaming occurs when the cerebral cortex synthesizes neural signals generated from ac
jeka94

Answer:

The correct answer is- activation synthesis theory

Explanation:

The activation-synthesis theory tells us about the role of neuron in dream production during sleep. It was first proposed in 1977 by Allan Hobson and Robert McCarley which was psychiatrists at Harvard University.

This theory says that in REM sleep some neurons in the lower brains for example in the brain stem randomly activates due to change in neural signals and dream occurs when the cerebral cortex tries to interpret the meaning of these neuron signal changes.  

So the correct answer to this question is- activation-synthesis theory.

7 0
3 years ago
If the sequence of one strand on DNA is CTA GCT CCA, what is the<br> complementary strand? *
vekshin1

Answer:

If the sequence of one strand on DNA is CTA GCT CCA,  the complementary strand is GAT CGA GGT.

Explanation:

The DNA molecule has four nitrogenous bases in its structure, two purines —adenine and guanine— and two pyrimidines, cytosine and thymine.

The two DNA strands are linked by hydrogen bonds established between their complementary nitrogenous bases, where a purine is complemented by a pyrimidine.

In the case of DNA, adenine is complemented by thymine and cytosine is complemented by guanine:

<em>A=T</em>

<em>C≡G</em>

In the sequence belonging to a DNA strand CTA GCT CCA, the strand that is complementary would be GAT CGA GGT.

6 0
3 years ago
A Paramecium has an internal sucrose concentration of 0.040 M, a glucose concentration of 0.035 M, and a fructose concentration
Nadusha1986 [10]

Answer:

<u>c. Sucrose and glucose</u>

Explanation:

The paramecium is a large, single-celled microbes, surrounded by a plasma membrane. Simple diffusion occurs in cells across plasma membranes, as a form of passive transport. In diffusion, solutes move from regions of high concentration to regions of low concentration across the plasma membrane.

Here, the internal environment has higher concentrations of sucrose and glucose, but lower concentrations of fructose, thus the solutes will move along their concentration gradient, to where the concentrations are lower. In order for the fructose molecules to move out of the cell, the molecules have to move against their concentration gradient - a process requiring energy known as active transport.  

6 0
3 years ago
One method used by newborn mammals to generate heat is referred to as nonshivering thermogenesis. This method utilizes a protein
stich3 [128]

Answer:

One method used by newborn mammals to generate heat is referred to as nonshivering thermogenesis. This method utilizes a protein channel called <u>thermogenin</u> which is present in high levels inside the mitochondria of <u>brown adipose tissue.</u>

Explanation:

Thermogenin forms a proton channel in the inner mitochondrial membrane in the brown adipose tissues. Most of the newborn mammals have these brown adipose tissues. In these tissues, the oxidation of nutrients do not produce ATP but generate heat. The heat is used by the newborn to maintain the warmer body temperature. The process is called nonshivering thermogenesis.

6 0
3 years ago
In this lab, you dissected a flower. The modified leaves that surround the reproductive parts are called ( ) . These structures
Effectus [21]

Answer:

petals and pistil

Explanation:

edge 2021

3 0
3 years ago
Read 2 more answers
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