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Naily [24]
2 years ago
12

(i) Label port A

Biology
1 answer:
just olya [345]2 years ago
7 0

Answer:

1) pollen grain (A), stigma (B), pollen tube (C), Ovary (D)

The pollen grain is a male reproductive part while ovary is the female reproductive part.

2) When a pollen grain lands on the stigma of a flower, a pollen tube begins to grow. It grows through the style until it reaches an ovule inside the ovary.

3) The pollen tube is a tube that transports the male gamete cells from the pollen grains to the ovule (female gamete) inside the ovary.

The nucleus of the pollen passes along the pollen tube and fuses with the nucleus of the ovule. This process is called fertilisation.

4) After the fertilisation, female parts of the flower develop into fruit and ovules become seeds.

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3 years ago
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What is the ability of a cell membrane to alow materia to pass through is called
zzz [600]

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Structure and function of the cell membrane

The cell membrane is semipermeable (or selectively permeable). ... The unique structure of the cell membrane allows small substances (like oxygen or carbon dioxide) to easily pass through.

Explanation:

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Does the resulting wave demonstrate destructive<br> interference? Explain your answer.
arsen [322]

Answer:

Destructive interference happens when one wave is oscillating the opposite way as the other one, so it compensates.

Explanation:

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3 years ago
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A diploid cell with 2n = 14 chromosomes undergoes the process meiosis. How many cells would be created after meiosis occurs and
barxatty [35]

4 cells would be created after meiosis and each cell would have 7 chromosomes.

<h3>Meiosis</h3>

Meiosis is the division of non-vegetative cells. It is a reductional division during which the ploidy level of the parent cell is halved in the daughter cells.

Thus, a cell with 2n = 14 that undergoes meiosis will produce daughter cells with n = 7.

Usually, 4 daughter cells are produced at the end of meiosis.

More on meiosis can be found here: brainly.com/question/7002092?referrer=searchResults

4 0
2 years ago
the outer ear channels sound waves down the external __________ to the __________, a tight membrane that vibrates in response to
aivan3 [116]

Answer:

Revisado por: Larissa Hirsch, MD

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in English

Ears

¿Qué es el oído y qué hace?

El oído consta de tres partes diferentes, que funcionan conjuntamente para captar sonidos y transmitírselos al cerebro: el oído externo, el oído medio y el oído interno.

El oído externo

El oído externo está formado por el pabellón auditivo (también conocido como "pabellón auricular" o "pabellón de la oreja") y el conducto auditivo. Los pabellones auditivos son las partes visibles que tenemos a ambos lados de la cabeza y están compuestos por cartílago duro cubierto de piel. La principal función del pabellón auditivo consiste en captar sonidos y conducirlos hacia el conducto auditivo, que conecta con el oído medio. Las glándulas de la piel que recubren el interior del conducto auditivo fabrican cera o cerumen, que protege este conducto, eliminado la suciedad y ayudando a prevenir posibles infecciones.

El oído medio

El oído medio es una cavidad llena de aire que transforma las ondas sonoras en vibraciones y las transmite al oído interno. El oído medio está separado del externo por el tímpano (o membrana timpánica), una fina lámina de tejido que va de lado a lado del conducto auditivo y que está fuertemente tensada sobre él. Los sonidos golpean el tímpano, haciendo que se mueva.

Explanation:

4 0
2 years ago
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