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atroni [7]
3 years ago
5

Describe Bohr's contribution to the atomic model.

Biology
1 answer:
icang [17]3 years ago
3 0

Explanation:

Bohr proposed his quantized shell model of the atom to explain how electrons can have stable orbits around the nucleus. The motion of the electrons in the Rutherford model was unstable because, according to classical mechanics and electromagnetic theory, any charged particle moving on a curved path emits electromagnetic radiation; thus, the electrons would lose energy and spiral into the nucleus.

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Explain why the populations of great apes in Africa are declining.
weqwewe [10]

Answer:

The number of gorillas and chimpanzees in Central Africa continues to decline due to hunting, habitat loss, and disease, combined with a widespread lack of law enforcement and corruption in the judicial process, according to a new conservation plan by IUCN, the Wildlife Conservation Society (WCS), WWF, and partners.

Explanation:

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3 years ago
Where are unmyelinated nerve fibers surrounded by schwann cells?
Ray Of Light [21]

Answer: The myelinated nerve fibres are enveloped with Schwann cells, it form a myelin sheath around the axon.

Unmyelinated nerve fibres is enveloped by a Schwann cell that doesn't form a myelin sheath around the axon, and  found in autonomous and the somatic neural systems. Sympathetic Nervous system is part of Autonomous Nervous system.

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5 0
3 years ago
Molecular anthropology ___________________ Question 1 options: uses genetic analysis of a DNA sequence to assess evolutionary li
kari74 [83]

Answer:

The correct answer is ''uses genetic analysis of a DNA sequence to assess evolutionary links.''

Explanation:

Molecular anthropology is a relatively recent branch, it refers to the study of biological phenomena (genetic study) at molecular levels, that is, biochemical, it allows us to understand and expand our knowledge about the evolution of the species and the complex phenomena of microevolution . It is closely related to other fields of anthropological study, among which we can mention primatology and genetics.Through molecular anthropology we are more aware of kinship, therefore, we can know human evolution over the centuries .

7 0
3 years ago
The idea that, when life originated on earth, a macromolecule other than dna served the role of information storage and that thi
svet-max [94.6K]

The RNA world hypothesis states that the earlier life-forms had relied only on RNA (Ribonucleic Acid) for the purpose of catalyzing the chemical reactions, and storing the genetic information. This hypothesis was proposed by Leslie Orgel, Carl Woese, and Francis Crick.

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Hence, the answer is RNA world hypothesis.

4 0
3 years ago
the substance present in the cell wall is protein true or falseboth animal and plant cells have cell membrane true or False​
Dima020 [189]

Answer:

true and true

Explanation:

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3 years ago
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