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vesna_86 [32]
3 years ago
12

Which plant division has seeds with a 3n endosperm due to double fertilization?

Biology
1 answer:
matrenka [14]3 years ago
7 0

Answer:

Angiosperms have seeds with an 3n endosperm due to double fertilization.

Explanation:

  • Double fertilization is found only in flowering plants.
  • In angiosperms, the female gametophyte does not grow after reaching eight nucleate stage.
  • After fertilization and triple fusion, the zygote and primary endosperm are created and further growth of embryo sac continues.
  • Triple fusion is the fusion of two haploid polar nuclei of female gametophyte and one male nuclei. This results in a  3n nucleus.
  • The developing embryo obtains nutrition from the endosperm.
  • If fertilization fails no endosperm is formed.

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What kind of bacteria are able to change pure nitrogen into ammonia compounds?
VMariaS [17]

Answer:

B. nitrogen-fixing

Explanation:

Nitrogen fixing bacteria are able to change pure nitrogen into ammonia compounds.

Nitrogen fixing bacteria are found in the soil close to the root of leguminous plants. They are get their own nutrition by chemosynthesis.

  • They take nitrogen from the atmosphere in form of nitrogen gas.
  • The nitrogen gas is converted into fixed nitrogen compounds such ammonia.
7 0
3 years ago
Which substance is needed for aerobic cellular respiration to occur
Alexxx [7]
Oxygen (O2)

Formula
Glucose + Oxygen -> Carbon dioxide + Water + ATP (energy)

The key word here is aerobic :)
Without oxygen anaerobic respiration will take place (less efficient in making energy)
8 0
3 years ago
At which part of the respiratory system does oxygen enter the bloodstream
zalisa [80]
<span>from the alveoli. it is a little sac in the lungs.</span>
4 0
3 years ago
Freud assumed that what was male was normal and that females were inferior
SVETLANKA909090 [29]

Answer:

The complete question is

Freud assumed that what was male was "normal" and that females were "inferior, castrated males."

Our answer is

True

Explanation:

Freud proposes that the boy and the girl begin, pre-Oedipally, having equal emotional position, attracted to the mother, and that the little girl is also a little man as the little girls are not distinct or sexually differentiated.

Freud stands on the concept of a single, masculine, libido: as its initial object is the mother and it's linked to masculinity and activity. He believes that there is no sexual classification or separation at the libido's most primordial phase. He further stated that a genital organization occurs after the Oedipal Complex which was derived in relation to castration as it is the final stage in sexual development. Thus, Freud stands on both children at infancy being ‘little men,’ with their desire construed via the process of a singular masculine libido.

Freud is of the belief that women are the inferior ‘castrated,’ males (lacking of a penis) and men are the normal one (who have penis).

6 0
3 years ago
What is photosynthesis?​
Leona [35]
The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.
6 0
3 years ago
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