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Tresset [83]
2 years ago
13

3. Viruses containing RNA as their genetic information are called (1 point)

Biology
1 answer:
Lelechka [254]2 years ago
8 0
Q3. The answer is retroviruses.
Retroviruses have single-stranded RNA. However, RNA cannot be incorporated into the host cell genome. To incorporate their genome, viruses first must produce DNA from their RNA genome inside of the host cell. This is actually the reason they are called RETROviruses. After that, DNA can be incorporated into the host cell genome.
-The other choices cannot be correct because: prophage is a genome of a bacteriophage which is a virus that infects bacteria while capsid is a protein that coats the genetic material of viruses.

Q4. The answer is Archaebacteria do not have peptidoglycan in their cell walls, but Eubacteria do.
Two bacteria kingdoms - Archaebacteria and Eubacteria have many in common. However, the main difference between these two kingdoms and the characteristic that best helps distinguish the kingdoms is the makeup of their cell walls.  Eubacteria have cell walls made of peptidoglycan while Archaebacteria have cell walls made of uncommon lipids and lack in peptidoglycan.

Q5.  Some bacteria provide nutrients and raw materials for organisms in an ecosystem.

<span>Since plants are not able to directly use atmospheric nitrogen, it must be converted into different form through a nitrogen cycle. Thanks to nitrogen fixing bacteria which converts atmospheric nitrogen into ammonium, nitrogen in the form of ammonium is now available to plants. </span>Also, bacteria are decomposers. After the death of producers and consumers, decomposers eat dead organisms and release carbon, nitrogen, and other elements into the environment.


Q6. The answer is acting as a pathogen.

A pathogen is a microorganism that can cause a disease. Among different groups of organisms, some bacteria can be pathogens. Some species are pathogenic and are able to cause diseases such as tuberculosis, tetanus, cholera, etc. This pathogenic role of bacteria cannot be beneficial for humans. On the other hand, usage of bacteria in genetic engineering for production of some vitamins or hormones, such as insulin that lack in diabetic patients, can be of a great benefit to humans.


Q7. The answer is releasing toxins.

Bacteria can produce toxins that can promote an infection and cause a disease. Bacterial toxins can be endotoxins and exotoxins. EXOtoxins are after secretion released out of the cell. ENDOtoxins remain as the part of the bacteria and they are released only if bacteria are killed by the immune system of the organism. The organism will response to the presence of endotoxins and usually, inflammation occurs.

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What does it mean when it says that aerobic respiration occurs in the cytoplasm “TO” the mitochondria???
Romashka-Z-Leto [24]

Answer:

Kerb cycle

<u>Explanation</u>:

The result from mitochondria is ATP, that acts as a currency of the energy in the cell. In the cytoplasm of mitochondria kerb cycle occurs. In this process it has several other process, once it uses acetate and water to give NADH from NAD+ and gives carbon dioxide as waste. The NADH formed is fed by oxidative phosphorylation or electron transport. The outcome of these processes is oxidation of nutrients to give chemical energy in ATP form.

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Bogdan [553]
Bird skeletons are very delicate, and therefore, difficult to be preserved.  The bones of the birds are soft. The small animals are very prone to physicochemical as well as biological decay. This is why the fossil record of bird is incomplete and well-preserved fossils of birds are rare to find, except at a few unusual sites. 
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3 years ago
State 2 environmental issues that could lead to environmental injustice
fenix001 [56]

Answer:

hope it helps you

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3 years ago
Which disorders can be observed in a human karyotype
s2008m [1.1K]

Answer:

Answered below.

Explanation:

A karyotype is defined as the size, shape, and number of chromosomes present in an organism.

An analysis is usually done on a karyotype to see if individuals have abnormal numbers or sizes of chromosomes. Such abnormalities may arise from;

Deletion: which implies that a chromosomal part is missing.

Duplication: where parts of a chromosome are repeated.

Translocation: which occurs when a chromosomal part breaks off and gets attached to another chromosome.

Nondisjunction: in which chromosomes do not separate from the parent cells.

Common chromosomal disorders arising from these abnormalities include;

Down's syndrome

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