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AfilCa [17]
4 years ago
14

Blank are chemical messagners secreted by glands

Biology
1 answer:
elixir [45]4 years ago
5 0

Answer:

The answer is probably hormone

Explanation:

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Which parts do BOTH animal and plant cells have?
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They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes.

Explanation:

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people think science tests should be more hands on opposed to sitting down in on spot for hours. I think it should be hands on so kids can remember and have a fun time doing so.

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2 years ago
What is the Cas9 enxyme used for?
frez [133]

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.

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7 0
3 years ago
After a copper smelter begins operation, local downwind populations of plants begin to adapt to the resulting air pollution. Sci
zlopas [31]

Answer:

Adaptation.

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Adaptation occurs when the acid tolerance of several plant species has increased significantly in the polluted area. The main reason for this tolerance is the change in the genetic makeup or mutation occurs in the cell due to the exposure of DNA to the chemicals of the environment that cause pollution. The plant adopt the environment by producing certain chemicals that cancel the effects of pollutants and as a result, the plant survive.

5 0
3 years ago
A student designs an experiment to test substances X, Y, and Z, to determine which one is a catalyst for the reaction: A + B ® C
guapka [62]
The effect of a catalyst is to increase the speed of the reaction, this is the speed at which reactants, A and B, are consumed, ant the product, C, is produced.


Given that when C is produced the solution bubbles, the bubbles are an indication of progression of the reaction.


The greater the speed of reaction, the earlier the reaction will end and the earlier the bubbles will stop.   


So the student can identify the catalyst because the bubbles will stop first.


Answer: <span>The test tube that stops bubbling first contains the catalyst.</span>
3 0
3 years ago
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