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Morgarella [4.7K]
2 years ago
11

Scientists infer that oxygen first began to enter Earth's atmosphere after the appearance of

Biology
1 answer:
GenaCL600 [577]2 years ago
8 0

Oxygen entered the Earth's atmosphere after the appearance of the Great Oxidation Event (Great Oxygenation Event). The Great Oxidation is the first mass extinction on Earth.

The Great Oxidation lasted 2.4 to 2.0 billion years ago.

Oxygen appeared on Earth thanks to cyanobacteria using photosynthesis.

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Most red deer who successfully reproduce have about four fawns during their lifetimes. However, a small percentage of red deer p
Rasek [7]

Answer:

Natural selection will favor red deer that produce a dozen or more offspring that survive for at least a year.

Explanation:

Natural selection results in adaptation, which means the increase of the aptitude phenotype.  Aptitude is the contribution of each genotype to the next generation.

Natural selection is the result between the individual phenotype and the environment that determines the destiny of genes. It is the differential capability of individuals to leave offspring.

Aptitude (or fitness) is the phenotype that results in the survival, fertility, and capability of having a mate. It is a way of measuring the individual ability to leave fertile offspring. Aptitude must be significant to the natural selection act in its favor.  

Natural selection, eventually, will favor red deer that produce a dozen or more offspring that survive for at least a year. These animals have more chances of leaving fertile descendants that will be able to grow, develop, survive, and reproduce. They have a higher aptitude than those individuals that only have four fawns during their lifetimes. These animals have fewer probabilities of leaving survival descendants able to reproduce.

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3 years ago
How can humans have a positive impact on air quality?
Svetradugi [14.3K]

Answer:A

Explanation:

did it on edgenueity 2020

3 0
3 years ago
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Are insects endothermic or ectothermic?
Yakvenalex [24]
<em>They are exothermic as they take temperature from  the surrounding and then maintain their internal body temperature according to the amount of heat absorbed :)</em>
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Which graph shows logistic growth of a population? *
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OB

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im preeeeety sure

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3 years ago
What is the difference between matter, atoms, and elements? Asking for a classmate since she doesn't have a phone :)
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Answer:

Matter is mass, Element is matter, and Atom is element.

Explanation:

Matter is anything that has mass or takes up space (Volume). Matter is made of elements. Elements such as carbon dioxide or gold. An atom is the smallest unit of matter. Elements are made of atoms. Atoms are what chemically makes an element. :) Hope she gets her phone!

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