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Mila [183]
3 years ago
5

There are _____ levels of cell organization recognized by biologists.

Biology
2 answers:
Alexandra [31]3 years ago
7 0

There are five levels of cell organization recognized by biologists.


BigorU [14]3 years ago
3 0
There are five levels of cell organization recognized by biologists.
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b

Explanation:

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(i) Label port A
just olya [345]

Answer:

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

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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.

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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
What keeps some of the radiation from the sun in the atmosphere
Olegator [25]

Answer:

the ozone layer can do that

Explanation:

3 0
3 years ago
In plants, meristematic cells are most similar to which type of cells in animal<br> tissues?
Vinvika [58]

Stem cells of the animals are the most similar to the meristematic cells of the plant.

<u>Explanation:</u>

  • Meristematic cells are the most important cells for the plant which give rise to the various tissues and plant organs. These meristematic cells are capable to undergo cell division and they are called totipotent.  
  • The stem cells of animals and humans are capable of doing the function by replacing the new cells for growth and development.
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4 0
3 years ago
The digestive system and the excretory system both excrete waste. Which best describes how waste is secreted in each system?
miss Akunina [59]
I'm not 100% sure, but I think that the digestive system excretes solid wastes only and the excretory system excretes liquid wastes only. So the 3rd option is probably correct. 
8 0
3 years ago
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