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Ber [7]
3 years ago
6

Were green algae the first plants

Biology
1 answer:
Savatey [412]3 years ago
5 0

Answer:

Yes. Green algae were considered to be the first ancestral organism to be considered part of the Plantae Kingdom. However, the first land plants appeared around 470 million years ago. These plants were a sort of moss like organism.

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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
Cell division is an example of cellular _______, whereas cell differentiation is an example of cellular ________.
-BARSIC- [3]

Answer:

Growth;  development

8 0
2 years ago
Read 2 more answers
Explain how animal benifet from the sun
Elodia [21]
The sun gives the animals energy to do whatever they want
4 0
3 years ago
Does every scientific method begin with an observation explain
Yuki888 [10]
No, not every scientific method begin with an observation. on basis of what we want, steps for scientific method changes.
And in scientific method before observation, first we predict (what will happen in the experiment). after prediction we observe. Prediction is known as hypothesis. And observation is what we are viewing.
7 0
3 years ago
Organic agriculture is _______.Organic agriculture is _______.a food-growing practice that uses no synthetic fertilizers, insect
Luba_88 [7]

Answer: a food-growing practice that uses no synthetic fertilizers, insecticides, fungicides, or herbicides

Explanation:

Organic agriculture is a process of crops of economic importance. It is an integrated farming system that ensures the sustainability, enhances the fertility of the soil, and that is biological diversity.

It prohibits the use of synthetic pesticide or insecticides, fungicides, synthetic fertilizers, growth hormones, antibiotics, and genetically modified organisms for the growth of crops. It utilizes the fertilizers of organic origin, like manure, compost, bone meal and also supports the crop rotation. It supports the biological pest control and fostering of insect predators.  

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3 years ago
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