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Svetllana [295]
3 years ago
13

What is leaf senescence?

Biology
1 answer:
Oksi-84 [34.3K]3 years ago
6 0

Answer:

D

Explanation:

leaf senescene is the process in which plants age

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The movement of molecules down a concentration gradient through transport proteins in the cell membrane is a type of
ioda

Answer:

Facilitated Diffusion

Explanation:

Some molecules can move down their concentration gradients by crossing to the lipid portion of the membrane directly,while others must pass through membrane protein s in a process called Facilitated Diffusion

4 0
3 years ago
The relationship of structure to function is one of the major themes in biology. For three of the following structure/function p
Elis [28]

Answer:

The function of  biomolecule inside our body system fully depends on the structure of that biomolecule.It is because the functional groups that participate in a  chemical or biochemical reactions are arranged in a specific array in the structure of that biomolecule or macromolecule.

Explanation:

a enzyme structure/catalysis   Enzymes are proteinecious in nature.Enzyme contain various amino acids in its active site such as histidine,serine,glutamic acid etc The amino acids of the active site of that enzyme interact with the substrate resulting in the formation of the product.

b mRNA structure/protein synthesis mRNA or messenger RNA consist of nucleotide sequence.The 3 concequetive nucleotides of an mRNA is termed as codons.Each codon codes for specific amino acid.The so formed amino acid linked with the adjacent amino acid by peptide linkage.

c cell membrane structure and signal transduction cell membrane contain various surface protein that act as receptor to detect signals by binding with signaling molecule during signal transduction process.

7 0
3 years ago
Question # 9
weeeeeb [17]
Photosynthesis is a process by which plants use sunlight, water, and carbon dioxide to produce carbohydrates, and other biological compounds, which reduces the amount of carbon dioxide in the air. This is the difference between plants and animals. The carbon dioxide is stored in the plants until they decompose or are burned. So, for example, each fall when the trees lose their leaves and the plants die the level of carbon in the atmosphere goes up. The rest of the tree, bark etc., does not continue to absorb carbon. Plants only take in carbon so long as they are growing and not after they have reached their natural height. Planting trees and other plants is one component of the solution to global warming, but the number of plants we have now cannot consume more carbon than they already do, and there is some evidence that warmer temperatures make photosynthesis more difficult.


The answer is RESPIRATION
8 0
3 years ago
Read 2 more answers
Is xylem a internal and external adaptation?
sergij07 [2.7K]
External adaption because it doesn’t adapt patterns
7 0
3 years ago
A man is brachydactylous (very short fingers; rare autosomal dominant), and his wife is not. Both can taste the chemical phenylt
netineya [11]

Answer:

The correct answer is -

A) BbTt x bbTt

B) .5^4 or 1/16 or 0.0625

Explanation:

As it is given that Brachydactylus and PTC tasters both traits are autosomal dominant conditions which mean only one allele would be enough.

For Branchydactylus and For tasting :  man and women will be heterogeneous.

Hence,

The Genotype of man = BbTt

The Genotype of wife = bbTt

b. Answer = 0.0625

For Branchydactylus:

Bb X bb

Possible genotypes:

B b

b Bb( Brachydactylus) bb(normal)

b Bb (Brachydactylus) bb (normal)

The probability of a single child being Branchydactylus = 2/4 = 0.5

So,  Probability of all 4 child being Branchydactylus = .5 x .5 x .5 x .5 = 0.0625

3 0
3 years ago
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