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julsineya [31]
4 years ago
11

What are rickettsia and why are they called by some " masters of reductive evolution"?

Biology
1 answer:
earnstyle [38]4 years ago
5 0
I rerally don't know help me
You might be interested in
A - DNA as the inheritance materials B - RNA as the inheritance materials C - The formation of organic molecules, e.g. nucleic a
Stels [109]

EXPLANATION:

There are 2 types of nucleic acids: DNA(deoxyribonucleic acid) and RNA(ribonucleic acid).

Living organisms have their genetic material in their DNA. Viruses use RNA as their genetic material but are usually called non-living things( because they can't reproduce without help from a host).

The function of nucleic acids has a progression from DNA to RNA to proteins. This is called the central dogma of molecular biology.

Nucleic acids are formed by a linkage of polynucleotide chains with phosphodiester bonds. These polynucleotide chains are formed from monomers called NUCLEOTIDES.

A nucleotide is made up of 3 parts:

i) a nitrogenous base

ii) a five-carbon sugar

iii) at least one phosphate group.

4 0
3 years ago
Read 2 more answers
Generally speaking, which of the following mutations would most severely affect the protein coded for by a gene?a) a base substi
Pavlova-9 [17]

Answer:

Answer is C.

Explanation:

For A and B, a base substitution affects one of the three bases that comprise a codon, the DNA/RNA unit that corresponds to a particular amino acid. If one base is substituted, one codon and therefore one amino acid will be affected. Codons have built-in redundancy, so even by changing one base, the new codon sometimes still corresponds to the same amino acid. Therefore, a base substitution at most affects one amino acid, and sometimes doesn't affect it all.

Frameshift mutations cause a lot more trouble. These occur when you have a deletion or insertion that changes the number of bases in your gene. As a result, the "frame" of the codons changes (everything shifts one way or the other by the number of bases added/removed). This affects EVERY codon downstream of the mutation, so you can imagine that such a mutation would have a bigger effect the closer to the start of the gene it occurs. This is why C is correct.

3 0
3 years ago
Which brain region is thought to be responsible for creating stressful memory imprints onto the nervous system?
Marina86 [1]

The correct answer is amygdala.

The amygdala is the part of the limbic system of the brain located within the temporal lobe. The functions of the amygdala include the processing of memory, emotional responses (fear, anxiety, and aggression), decisions.. It’s also a brain structure involved in turning on the stress response and actions that are related to stress and self-defense.


3 0
4 years ago
PLEASE HELP! In this simulation, the masses of the planets were all the same. Do you think if the masses of the planets were dif
Shkiper50 [21]

Answer:

It would certainly make a difference.

Explanation:

The mass of a planet determines how thick the planets atmosphere would be, if it can even sustain an atmosphere. If all the masses are the same, all of the large planets would not be able to sustain life, while all of the smaller, denser planets still have a chance.

The mass of a planet also affects it’s gravitational pull. If all of the planets had the same mass, they would all have the same gravitational pull, meaning that they would all attract the same amount of asteroids, meteors, and other spacial objects.

Overall, the simulation would certainly be different, for many, many reasons. The above are only two, and if you would like more, just add a comment and I can give you more.

4 0
3 years ago
One day after an uncomplicated spontaneous vaginal delivery, a 23-year-old woman, gravida 1, para 1, has the onset of loss of sm
ololo11 [35]

A hypotonic state of the bladder, or conduct and duration of labor and peripartum bladder management, and the use of epidural anesthesia may all contribute to overflow incontinence.

Overflow incontinence is characterized by uncontrolled, spontaneous passing of urine because of an overfull  bladder.

8 0
4 years ago
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