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kiruha [24]
3 years ago
12

What is activation energy?

Biology
2 answers:
Aleks04 [339]3 years ago
4 0

Answer: The activation energy is: the energy needed to get a reaction started

Explanation: this is dealing with enzymes and their reactions

nadya68 [22]3 years ago
3 0

Answer:The energy needed to get a reaction started.

Explanation:

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What is the term for a top predator that contributes to the maintenance of species diversity among its animal prey?
andreev551 [17]

Answer:

Option A, keystone species

Explanation:

Keystone species are responsible for controlling any species from becoming dominant over all other species. The keystone species are found at the top of all the energy pyramids and food chains.

They control the explosion of population of prey and hence regulate the overall ecological diversity.  

Some common example of keystone species is as follows –  

Bison, prairie dog, large mammalian predators,  

 

Hence, option A is correct

3 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
The Precambrian eon is separated from the Phanerozoic eon in the fossil record because of
Usimov [2.4K]

The Precambrian eon is separated from the Phanerozoic eon in the fossil record because of the sudden appearance of organisms.

Explanation:

Precambrian eon is the initial existence on earth that can be predicted by the study of rocks and remaining of fossils. It has been seen as the existence of skeleton in this era, before this era no such things has been observed, even the development of sexual reproduction.

The Phanerozoic era comes after the Precambrian era, more advanced kinds of fossils of animals had been observed in this era.  Phanerozoic era period of life on earth. Large organisms sudden appearance are seen in the Phanerozoic era i.e. First dinosaurs, mammals, fishes, angiosperms,first vertebrates etc.

5 0
3 years ago
How does meiosis reduce the number of
Vladimir79 [104]

Answer:

Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. The process results in four daughter cells that are haploid, which means they contain half the number of chromosomes of the diploid parent cell.

8 0
2 years ago
Which is the correct order of developer of the human embryo ???ASAP please
kari74 [83]

The initial stages of human embryogenesis.

8-cell embryo, at 3 days.

Blastocyst with an inner cell mass and trophoblast.

Trophoblast differentiation.

Histogenesis of the three germ layers.

Artificially colored - gestational sac, yolk sac and embryo (measuring 3 mm at 5 weeks)

Embryo attached to placenta in amniotic cavity.

7 0
3 years ago
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