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amid [387]
3 years ago
8

Why is it significant that pollen contains a multicellular male gametophyte instead of just male gametes?

Biology
1 answer:
Mars2501 [29]3 years ago
8 0

Answer:

The given options are false regarding the question, the correct answer should be -

multicellular male gametophyte has a non-gamete cell that controls growth and development to the pollen tube and the male gamete.

The importance of these nongenetic cells of the male gametophyte is to control the development and growth of pollen tube that is an essential structure for pollination and fertilization.

You might be interested in
What is the result of mitosis and cytokinesis
vichka [17]

Answer:

Mitosis is a type of cell division in which a single parent cell is divided into two daughter cells. Before mitosis, replication of chromosome occurs in which two copies are formed from a single set of chromosome. These two copies of chromosome are distributed among the daughter cells.

Cytokinesis is the phase of cell division in which cytoplasm of the cell is divided into two equal parts and distributed to each daughter cell.

4 0
3 years ago
If the blood pressure in your brain is 120 mm when you are lying down, what would it be when you stand up? Assume that your brai
Mashutka [201]

Answer:

The correct answer is 88.84 mmHg.

Explanation:

The pressure differential between the brain and the heart while standing up will be 120 - rho × g (gravity) × h, here h is the distance from the brain to the heart. The h is 40 cm or 0.4 m.  

rho×g×h = 1060 kg/m³×9.8 m/s²×0.4m  

= 4155 Pa  

Now converting Pa to mmHg we get:  

4155 Pa × 760 mmHg / 1.01325 × 10⁵ Pa  

= 31.16 mmHg  

Thus, the pressure in the brain now is 120 - 31.16  

= 88.84 mmHg (hypotension)  

6 0
3 years ago
(04.05 MC)
gregori [183]

Answer: Increased reproductive success of individuals with the ability to survive in a variety of water temperatures

Explanation: Natural selection establishes that the conditions of an environment favor or hinder (select) the reproduction of organisms according to their characteristics. Natural selection was proposed by Darwin as a means to explain biological evolution.

The trait subject to selection must be inheritable.

There must be variability of the trait among the individuals of a population.

The variability of the trait must give rise to differences in the survival or success of the player, making certain characteristics of the new appearance can be extended in the population.

The accumulation of these changes over generations would produce all evolutionary phenomena.

8 0
3 years ago
What other adaptation could have helped koalas as they evolved from land dwellers to tree dwellers?
Solnce55 [7]

Answer: Their fur color matches with the color of eucalyptus bark.

Explanation: Since their fur is matching with the eucalyptus bark, it is a much more suitable habitat than other places where their fur may not help them camouflage.

7 0
3 years ago
The lipopolysaccharide layer (LPS) is a characteristic of the wall of ________.
natali 33 [55]

Answer:

Gram-negative bacteria

Explanation:

Gram-negative bacteria are classified by the color they acquire after undergoing a chemical process called Gram stain. In this process, Gram-negative bacteria, which have a thinner polysaccharide wall (relative to gram-positive bacteria) that do not retain the violet crystal (used in gram staining) during the discoloration process and are red in color. final coloring process.

Gram-negative bacteria turn red when using this process. The other bacteria get blue in color. They are called Gram positive. Gram-negative and Gram-positive bacteria are different in color because their cell walls are different. They also cause different types of infections and different types of antibiotics are effective against them.

Gram-positive bacteria retain the violet crystal due to the presence of a thick layer of polysaccharides. Gram-negative bacteria have a thinner polysaccharide wall.

6 0
3 years ago
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