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Elis [28]
3 years ago
7

So-called "dark matter" cannot be directly observed because

Biology
2 answers:
Inga [223]3 years ago
5 0

Answer:

B. it gives off no radiation

Explanation:

Dark matter is so named because it neither absorbs nor emits light and therefore cannot be directly observed.

Ghella [55]3 years ago
5 0

Answer:

B

Explanation:

it gives off no radiation

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What process forms egg cells
Gala2k [10]

Explanation:

meiosis is a type of cell division that creates egg and sperm cells meiosis is a fundamental process for life during mitosis a cell duplicates all of the contents cleaning its chromosomes and splits to form two identical daughter cells

4 0
3 years ago
The leaves at the top of a tree’s canopy are exposed to direct sunlight during the day, and their phytochromes will occur in a h
olya-2409 [2.1K]

Answer:

Explanation:

1)Pfr/Pr

2) Pr

3)far-red

Explanation:

The leaves at the top of a tree’s canopy are exposed to direct sunlight during the day, and their phytochromes will occur in a high *Pfr/Pr* ratio. Meanwhile, the leaves of the same tree at the bottom of the canopy are highly shaded during the day and will likely have a higher proportion of the * ( PHYTOCHROME )Pr *;form of phytochrome present due to exposure to a higher proportion of *FAR RED * light.

Plants make use of the phytochrome system to it's adjust growth based on the seasons. Through phytochrome plants is able to respond to the timing and duration of dark and light periods. At dawn, all the phytochrome molecules present in the leaved are converted to the active Pfr form until sunset this is because the sun is unfiltered, and unfiltered sunlight has high percentage of red light, but lower far-red light, with the help of phytochrome system , the plants is able to compare the length of dark periods over several days.

7 0
3 years ago
The level of which hormone increases after ovulation?
MArishka [77]

The answer should be C, progesterone.


Progesterone is the hormone which can help maintain the lining of uterus and to further thicken it so that the uterus is prepared for implantation and the development of a baby. The level of progesterone is significantly rose after ovulation.


On the other hand, LH, luteinising hormone, is produced by oestrogen, another female hormone which will drop after ovulation. LH helps stimulate ovulation and prevent the development of other follicles, the origin of eggs, to form yellow body instead. Which yellow body is the one which stimulates the production of progesterone.


Last but not least, I believe D should be testosterone, and it is a male hormone so it will not be found in female normally.


Therefore, your answer should be C, progesterone.

3 0
3 years ago
The type of instrumment thay can show detailed images of the internal structure of the cell is the
asambeis [7]
It is an microscope
6 0
3 years ago
Difference between Flora and Fauna.
Studentka2010 [4]

Answer:

Explanation:Flora includes all organisms that may synthesize its food itself and are often immobile, they mainly comprise of all plants, trees, shrubs while fauna are categorised to be organisms that have to acquire meals and and are usually mobile and feed on other living organisms themselves.

8 0
3 years ago
Read 2 more answers
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