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Lyrx [107]
3 years ago
15

Which evolved first, photosynthesis or cellular respiration?

Biology
1 answer:
Readme [11.4K]3 years ago
6 0

Answer:

Because photosynthesis is a source of oxygen, it seems intuitive that photosynthesis evolved first: once enough O2 was in the air, then respiration would be able to arise in the newly oxygen-enriched atmosphere. However, some biologists have argued since the 1970's that respiration in fact evolved first.

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For each of the following statements, indicate whether the statement describes the P generation, F1 generation, or F2 generation
madreJ [45]

Answer:

The plants that were allowed to self pollinate were the First filial generation, filial, Latin for family. Or just the F1 generation plants.

The plants that are true breeding are Parental generation or for shorthand, the P generation plants.

The plants where there were three times as many tall plants as short plants are in the second filial generation, or the F2 generation.

This question is based on the Mendel’s Experiment.

Sir Gregor Johann Mendel.

4 0
3 years ago
Read 2 more answers
A fish maintains its depth in fresh water by adjusting the air content of porous bone or air sacs to make its average density th
Volgvan

Answer:

0.153

Explanation:

We know the up-thrust on the fish, U = weight of water displaced = weight of fish + weight of air in air sacs.

So ρVg = ρ'V'g + ρ'V"g where ρ = density of water = 1 g/cm³, V = volume of water displaced, g = acceleration due to gravity, ρ'= density of fish = 1.18 g/cm³, V' = initial volume of fish, ρ"= density of air = 0.0012 g/cm³ and V" = volume of expanded air sac.

ρVg = ρ'V'g + ρ"V"g

ρV = ρ'V'g + ρ"V"

Its new body volume = volume of water displaced, V = V' + V"

ρ(V' + V") = ρ'V' + ρ"V"

ρV' + ρV" = ρ'V' + ρ"V"

ρV' - ρ"V'  = ρ'V" - ρV"

(ρ - ρ")V'  = (ρ' - ρ)V"

V'/V" = (ρ - ρ")/(ρ' - ρ)

= (1 g/cm³ - 0.0012 g/cm³)/(1.18 g/cm³ - 1 g/cm³)

= (0.9988 g/cm³ ÷ 0.18 g/cm³)

V'/V" = 5.55

Since V = V' + V"

V' = V - V"

(V - V")/V" = 5.55

V/V" - V"/V" = 5.55

V/V" - 1 = 5.55

V/V" = 5.55 + 1

V/V" = 6.55

V"/V = 1/6.55

V"/V = 0.153

So, the fish must inflate its air sacs to 0.153 of its expanded body volume

5 0
3 years ago
A new recruit in the armed forces stands at attention on a hot afternoon. He decides to lock his knees, thinking it will make th
Bess [88]
There are no options to choose from and this makes it hard to answer the question. I hope my answer is correct and comes to your help. The reason that the new recruit fainted was that he did not use muscular compression to return the blood to the heart and thus his brain became devoid of oxygenated blood, resulting in the new recruit getting fainted.
7 0
3 years ago
You are giving ventilations to a 5-year-old child through a resuscitation mask, you should give 1 ventilation about every
Yuki888 [10]
You should typically give ventilation’s to a young child every 30 seconds.

Hope I could help! :)
7 0
3 years ago
Which of these actions could extend the life span of our current coal supply?
sp2606 [1]

Clean coal technologies, such as advanced coal-fired power generation and carbon capture and storage, can allow the world's coal resource to be used in ways that are compatible with environmental and climate goals. The correct option is C.

<h3>What is coal capture and storage?</h3>

Carbon capture and storage (CCS) is the process of capturing carbon dioxide (CO2) before it enters the atmosphere, transporting it, and storing it for centuries or millennia (carbon sequestration).

Clean coal technologies, such as advanced coal-fired power generation and carbon capture and storage, can allow the world's coal resource to be used in ways that are compatible with environmental and climate goals.

Thus, the correct option is C.

For more details regarding coal storage and capture, visit:

brainly.com/question/3652546

#SPJ1

3 0
2 years ago
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