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3 years ago

Which human has the most negative effect on the stability of an ocean environment

Biology

2 answers:

Alenkasestr [34]3 years ago

8 0

Answer: Nicki Minaj her

Explanation: Her body is completely plastic

Nastasia [14]3 years ago

5 0

Answer: Kylie Jenner is the answer.

Explanation: When Kylie goes for a swim, she is just putting plastic straight into the ocean.

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Why do you think that planting new trees and plants is an important part of fighting against deforestation ?

butalik [34]

it is not because trees do not grow fast enough

5 0

3 years ago

5. The products of photosynthesis are

vichka [17]

Answer:

C. Glucose and oxygen

Explanation:

Photosynthesis takes water, carbon dioxide, and light energy and turns it into cellular energy (glucose) and converts the carbon dioxide into oxygen. Plants are so vital to human life due to this process as they produce both the energy we need and air we breathe to survive.

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3 years ago

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What are the 4 types of Evidence for the evolution?

lesya692 [45]

The types of evidence for evolution include
i) Changes in allele frequency over subsequent generations.
ii) When the population in question is examined it does not follow Hardy-Weiberg equilibrium.
iii) Signs of gene flow between populations.
iv) Presence of Sewall-Wright effects or genetic drift in the population.
Please mark as brainliest.

6 0

3 years ago

Which one of these is involved in adaptive and humoral immunity?

SpyIntel [72]

Answer:

(d). B-cells.

Explanation:

Adaptive immunity can be described as immunity which develops in response to exposure to a pathogen (or foreign molecule). throughout the life. It is divided into two types, humoral immunity and cell-mediated immunity.

Humoral immunity is mediated by B cells that secrete antibodies against particular antigens. These antibodies recognize and neutralize the antigens and activate cell-mediated immunity, which is mediated by T cells.

Thus, the correct answer is option (d).

4 0

3 years ago

The crispr system involves the cas9 enzyme, which identifies specific nucleotides to be cut using a(n) ________ molecule as a gu

bonufazy [111]

Answer:

RNA

Explanation:

CRISPR system was discovered by a Japanese scientist. Naturally bacteria and many other prokaryotes have CRISPR system in their genome which they use as a self defense against a pathogen which is invading them. It consists of inter spaced, short palindromic nucleotide repeats which encode a guide RNA (gRNA). This guide RNA (gRNA) recognizes the target sequence on the pathogen. The gRNA is followed by Cas9 enzyme which along with the gRNA plays a very important role in breaking genome of the pathogen. Once the target gene is cut down the rest of the DNA can be rejoined by non homologous end joining.

But nowadays, scientists are using this system for genome editing and incorporating desired gene between the two ends which are cut down by CRISPR Cas9 system.

7 0

3 years ago

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