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trasher [3.6K]
1 year ago
6

Hello, I need double check with this question please and thank you

Biology
1 answer:
lakkis [162]1 year ago
4 0

The answer is Eukaryotes.

We know thta is the correct answer because as it is described in the excercise, the unknown organism is:

multicellular

has chloroplasts

has a nucleus

has organelels

Both Archaeans and Bacteria do not have a nucleus (prokaryotic cells) and also are single-celled organisms.

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You have learned that the fusion of egg and sperm produces a zygote. But how does the sperm reach the egg, and how does the zygo
FrozenT [24]

Answer:

Pollen grain lands on stigma

Explanation:

A) Pollen grain lands on stigma

  • pollen tube grows down the style
  • generative cell divides, forming two sperm
  • two sperm are discharged to them female gametophyte
  • sperm fuse with the egg and two polar nuclei
  • zygote forms and divides into a terminal cell and a basal cell
  • cells of embryo differentiate into three tissue types---- seed dries out and becomes dormant.

B)

  1. During pollination, a pollen grain is transferred from an anther to a stigma. Once the pollen grain lands on a suitable stigma, it germinates and forms a pollen tube, a structure that grows down through the style to the ovary.
  2. Once in the pollen tube, the generative cell from the pollen grain divides by mitosis, forming two sperm. The sperm travel down the pollen tube and are discharged into the female gametophyte. In a process called double fertilization, one sperm fertilizes the egg, forming the zygote; the other sperm fuses with two polar nuclei in the female gametophyte, forming a triploid (3n) nucleus. The zygote develops into the plant embryo, and the triploid nucleus divides and gives rise to the endosperm. Double fertilization prevents the waste of the plant's resources by ensuring that the nutrient-rich endosperm only develops if the egg is fertilized.
  3. After double fertilization, the ovule starts to develop into a seed containing the plant embryo. As the embryo develops, the three tissue systems are established, and the cotyledons (seed leaves) form. The seeds of many species dry out as they mature. These dry seeds lie dormant until suitable germination conditions occur.

3 0
3 years ago
What are the two ways cross pollination can occur?
Alex

Answer:

it can happen through animals like birds bees and other things or through wind

Explanation:

sorry this is such a simple answer

5 0
4 years ago
Reason to be vegan:<br> plants dont feel pain <br> "thIs gUrl iS On c0ca1ne"
dalvyx [7]

Answer:

Being vegan is great for your health! ... Vegans get all the nutrients that they need to be healthy, such as plant protein, fiber, and minerals, without all the nasty stuff in meat that may slow you down and make you sick, such as cholesterol and saturated animal fat.

Explanation:

3 0
3 years ago
Anchoveta feed on large
mojhsa [17]

Answer:

Anchoveta feed on large  zooplankton whereas sardines  feed mainly on phytoplankton.  Use this information to suggest  why sardine numbers are less

likely to collapse during an El  Niño event?

Reason why sardine are less likely to collapse during an El Nino event is as  a result of sardine survival is neither dependent  on zooplankton nor anchoveta rather sardine is dependent on phytoplankton which is not scarce

Explanation:

8 0
3 years ago
If a doctor wanted to be sure that a patient's urinary system is working properly, what would be the BEST indicators to investig
rusak2 [61]

Answer:

Its a

Explanation:

I just took the test

5 0
2 years ago
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