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quester [9]
3 years ago
10

The appearance of free oxygen in the earths atmosphere led to the "great oxidation event" where did all of this oxygen come from

Biology
1 answer:
Alborosie3 years ago
8 0

Answer:

So there's a simple explanation for the Great Oxidation Event. It was the cyanobacteria, pumping out unwanted oxygen, that transformed Earth's atmosphere. ... That means the cyanobacteria were busy pumping out oxygen for at least half a billion years before oxygen started appearing in the air.

Explanation:

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Syntenic genes can assort independently when:_________.
Arturiano [62]

Answer:

4.

Explanation:

Synteny oe syntenic gene is defined as the physical co-localization of genetic loci on the same chromosome within a speciesand inidvidual.

In the beginning of the meiosis process, when genes are present in the same chromosomes but very far, they undergo indepedent assort due to homologous recombination and the random exchnage of matching fragment in  homologous chromosomes takes place. During the crossing over there are very less chances that all types of gametes are produced accurate frequency.

Hence, the correct answer is 4.

7 0
3 years ago
Supporting cells of the nervous system are collectively called:
tester [92]

Answer:In the central nervous system, the supporting cells are collectively referred to as neuroglia.

Explanation:In the central nervous system, the supporting cells are collectively referred to as neuroglia.

5 0
2 years ago
How many years might primary succession take with medium amounts of rainfall and temperature? Explain why ​ HELPP PLEASE HELP
serious [3.7K]

Answer:

The primary succession process can take hundreds of years to happen, even in medium amounts of rain and temperature.

Explanation:

The primary succession occurs when a community of plants begins to sprout in areas that have never been occupied by any type of living being. The primary succession occurs, for example, with the sprouting of vegetables in rocky outcrops. These plant species are known as primary species and although they are able to survive, these environments offer few resources for the development of living things. Generally, it takes hundreds and even thousands of years for primary succession to occur, even in environments with average temperature and precipitation.

3 0
3 years ago
What evidence can be examined when determining common ancestry amongst hominids?
mars1129 [50]

We examined the biogeographic patterns implied by early hominid phylogenies and compared them to the known dispersal patterns of Plio-Pleistocene African mammals. All recent published phylogenies require between four and seven hominid dispersal events between southern Africa, eastern Africa, and the Malawi Rift, a greater number of dispersals than has previously been supposed. Most hominid species dispersed at the same time and in the same direction as other African mammals. However, depending on the ages of critical hominid specimens, many phylogenies identify at least one hominid species that dispersed in the direction opposite that of contemporaneous mammals. This suggests that those hominids may have possessed adaptations that allowed them to depart from continental patterns of mammalian dispersal.

plz mark me as brainliest if this helped :)

6 0
3 years ago
A plants root system is which level or organization?
MaRussiya [10]

its B. Organ b/c the plants root are part of the plant

8 0
3 years ago
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