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Semenov [28]
2 years ago
14

Angiosperms are thought to have originated in which period?.

Biology
1 answer:
Nuetrik [128]2 years ago
4 0

Answer:

Angiosperms evolved during the late Cretaceous Period, about 125-100 million years ago.

hope it helps.

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What caused the Kingdom of Life to change? Give 3 reasons minimum.​
docker41 [41]

Answer:

Due evolution, discoveries and having both characteristics.

Explanation:

The Kingdom of Life change due to evolution in the body of organisms, discoveries of new organisms that are different from plants and animals. There are some organisms that have both plant and animal characteristics so it can't be placed in plant or animal kingdom so that's why the kingdom of life changes from two kingdom system to 5 kingdom system.

3 0
3 years ago
In the electron transport system
antoniya [11.8K]

Answer:

A. NADH and FADH2 both donate electrons at the same location.

Explanation:

In the respiratory chain, four large protein complexes inserted into the mitochondrial inner membrane transport NADH and FADH₂ electrons (formed in glycolysis and the Krebs cycle) to oxygen gas, reducing them to NAD⁺ and FAD, respectively.

These electrons have great affinity for oxygen gas and, when combined with it, reduce it to water molecules at the end of the reaction.

Oxygen gas effectively participates in cellular respiration at this stage, so its absence would imply interruption of the process.

NADH and FADH₂ electrons, when attracted to oxygen, travel a path through protein complexes, releasing energy in this process.

The energy released by the NADH and FADH₂ electrons in the respiratory chain in theory yields <u>34</u> <u>ATP</u>, however, under normal conditions an average of 26 ATP molecules is formed.

If we consider that these 26 molecules are added to the two ATP formed in glycolysis and two ATP formed in the Krebs cycle, it can be said that cellular respiration reaches a maximum yield of 30 ATP per glucose molecule, although theoretically this number was 38 ATP per glucose molecule.

5 0
3 years ago
based on the fluid mosaic model of the cell membrane, which type of molecule can move passively across the membrane, without the
Monica [59]

Answer:

My guess would be H₂O/ water, since osmosis is a form of passive transport and I can't see the model the question references. Gases like O₂/ oxygen, CO₂/ carbon dioxide, and simple sugars like glucose can also pass through a cell membrane with passive transport though.

8 0
3 years ago
Downy mildews attack many crop species.<br> True or False
Ganezh [65]

true good luck with that

5 0
4 years ago
Read 2 more answers
What is the difference between inquiry and hypothesis when using the scientific method​
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Explanation:

A hypothesis is defined as an educated guess , while a research question is simplify a research wondering about the world .

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