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3 years ago

Meiosis occurs within what structure during the pine tree life cycle?

Biology

1 answer:

kakasveta [241]3 years ago

7 0

<h2>Inside the cones of pine tree</h2>

Explanation:

The life cycle of a pine tree starts in the strobulus, the sexual conceptive structure in a completely adult pine tree. Strobulii is otherwise called the "pine cones." Male strobulii are in the lower some portion of the tree, while the female structures are in the upper part. The strobulli are viewed as unisexual structures since they have either male or female sexual organs. The male strobulli in a pine tree contains microsporocytes, grains that in the end form into dust. In the spring months, male strobulli discharge dust into the air, which is focused on the pine tree's female strobulli.
A pine seed finds the right micro-climate, it will in the eventually sprout and a pine seedling begin to develop. Be that as it may, pine seeds are typically discharged in a torpid state, which is regularly broken by chilly stratification. Therefore, a pine seed won't grow until the accompanying spring when warm climate and some spring dampness are available. Since pine seeds are created in rich numbers, and just a small rate should be successful in building up new seedlings.

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Which of the following stick models best represents chromosomes showing all the possible products of meiosis in the gametes (egg

il63 [147K]

Answer:

Explanation:

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4 years ago

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erica [24]

1-Matter and 2-Conduction

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4 years ago

Which statement explains how a DNA mutation causes sickle-cell anemia? (point)

gavmur [86]

Answer:

The DNA mutation causes a change in the amino acid sequence for hemoglobin, which causes a change in the shape of red blood cells.

Explanation:

Sickle cell anemia is one of a group of disorders known as sickle cell disease. Sickle cell anemia is an inherited red blood cell disorder in which there aren't enough healthy red blood cells to carry oxygen throughout your body.

Normally, the flexible, round red blood cells move easily through blood vessels. In sickle cell anemia, the red blood are shaped like sickles or crescent moons. These rigid, sticky cells can get stuck in small blood vessels, which can slow or block blood flow and oxygen to parts of the body.

Sickle cell anemia is caused by a mutation in the gene that tells your body to make the iron-rich compound that makes blood red and enables red blood cells to carry oxygen from your lungs throughout your body (hemoglobin). In sickle cell anemia, the abnormal hemoglobin causes red blood cells to become rigid, sticky and misshapen.

The sickle cell mutation reflects a single change in the amino acid building blocks of the oxygen-transport protein, hemoglobin. This protein, which is the component that gives red cells their color, has two subunits. The alpha subunit is normal in people with sickle cell disease. The beta subunit has the amino acid valine at position 6 instead of the glutamic acid that is normally present. The alteration is the basis of all the problems that occur in people with sickle cell disease.

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3 years ago

Which of the following represents organisms in a food chain?

Lisa [10]

Answer: c seeds, mice, snakes

Explanation:

a hawks, owls, eagles NO

These animals all eat some form of meat, and they are on the top of all of their food chains. If you put these animals in a room with no food, there'd be no food chain, and they would got out at each other until there was one left, and there'd be no advatanges because 1. they can all fly and 2. they are all top consumers. The same thing goes for D except hyenas can't fly.

b deer, rabbits, cows NO

This is not a food chain because all of the animals are herbivore, so they only eats plants and will not eat each other.

c seeds, mice, snakes YES

The seeds are a producer which is to be eaten by a consumer (the mouse), and which are then eaten by the predator, the snake.

d hyenas, vultures, crows NO

Hope this helps, now you know the answer and how to do it. HAVE A BLESSED AND WONDERFUL DAY! As well as a great Valentines Day! :-)

- Cutiepatutie ☺❀❤

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3 years ago

What are the two types of fermentation that results from anaerobic cellular respiration

polet [3.4K]

Answer:

there are two types of fermentation lactic acid fermentation and alcoholic fermentation

Explanation:

This occurs when muscle cells cannot get oxygen fast enough to meet their energy needs through aerobic respiration.

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3 years ago