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Kaylis [27]
3 years ago
5

20 POINTS

Biology
2 answers:
horrorfan [7]3 years ago
8 0
It’s c sorry if i’m wrong tho
WARRIOR [948]3 years ago
5 0
Answer is B. Bacteria can survive in all of those conditions !
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HELP ME ASAP!!!!!!!!!!!!!!!!
fredd [130]

28. <u>Answer</u>: All mutations do not affect the organisms due to the following reasons:-

1. The DNA consists of both coding and non coding regions. The coding regions are known as exons and non coding regions are called as introns. The <em>non coding regions </em>do not make up the protein. Thus, if the mutations occur in non coding regions they do not affect the organism.

2. There are some mutations that result in the change of the codon but the new codon formed codes for the same amino as the previous one. This is possible because of the degeneracy of genetic code. For eg, AAA codes for lysine, however if the mutation changes this code to AAU then this also codes for lysine. Such mutations are called as <em>silent</em> mutations.

3. There are some mutations which result in the change in amino acid however the new amino acid formed is similar to the previous one in its properties for e.g leucine and isoleucine. Such mutations are called as <em>neutral</em> mutations and they do not affect the organism


29. <u>Answer</u>: 1. The process of mitosis results in the formation of <em>two diploid cells</em> whereas meiosis results in the formation of <em>4 haploid cells.</em>

2. The process of mitosis takes place to produce copies of the <em>body cells </em>whereas the process of meiosis takes place to produce the <em>gametes</em>.

<u>Explanation</u>:-

  • <u>Mitosis</u> is a process in which a cell undergoes a single round of division to produce two identical copies of itself . It occurs in 4 phases Prophase, metaphase, anaphase and telophase. This process occurs in the body cells.
  • <u>Meiosis</u> is a process in which a cell undergoes two rounds of cell division to produce 4 copies of haploid cells from a single diploid cell. This process takes place for the formation of gametes.

29. <u>Answer</u>:

<em>Pros</em>

1. Genetic engineering helps us to tackle several diseases. There are many diseases which are caused due to genetic mutations. Genetic engineering helps us to rectify these mutations and hence combat such diseases.

2. Genetic engineering helps us to produce new foods which can withstand adverse conditions such as high/low temperatures, low rainfall, are disease and pest resistant etc. This, genetic engineering helps to significantly improve crop production.

<em>Cons</em>

1. Genetic engineering leads to a decrease in genetic diversity.

2. It can lead to a decrease in the nutritional value of food as genetic engineering often causes an accelerated growth of animals and hence, the nutritional valie of poultry foods is compromised.


3 0
3 years ago
Which plants are most likely to adapt successfully to a climate change in their environment?
sergejj [24]

Answer:

A

Explanation:

plants that grow rapidly

8 0
3 years ago
The human body does not constantly lose water through _______.
S_A_V [24]

The human body does not constantly lose water through hydration and circulation. When someone is hydrated, he is drinking an enough amount of water to sustain the needs of his body. Circulation then helps this in distributing the water in different parts of the body.

8 0
3 years ago
If something doesn't fulfill all of the
Vinil7 [7]

Answer:

C. Viruses

Explanation:

Viruses lack the properties of living things. They have no energy metabolism, they do not grow, they produce no waste products, and they do not respond to stimuli. They also don't reproduce independently but must replicate by invading living cells.

3 0
3 years ago
Read 2 more answers
Most of Earth's energy comes from the Sun. Where does the rest come from?
ki77a [65]

Answer:

The answer is nuclear fusion

Explanation:

Solar energy is created by nuclear fusion that takes place in the sun. Fusion occurs when protons of hydrogen atoms violently collide in the sun's core and fuse to create a helium atom.

6 0
2 years ago
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