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Fynjy0 [20]
3 years ago
10

How many parts of the brain are there?

Biology
1 answer:
denis23 [38]3 years ago
4 0
The human brain can be divided into three<span> main parts: the forebrain, midbrain, and hindbrain: 1/ The forebrain includes the several lobes of the cerebral cortex that control higher functions.</span>
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In which of the following ways does a bacterial cell differ from an animal cell?
Paraphin [41]

Answer: It would be option D, "a bacterial cell does not have membrane-bound organelles, whereas an animal cell does." Bacteria cells are prokaryotic. This means that they have no membrane bound nucleus or membrane bound organelles whereas a plant or animal cell does.

6 0
3 years ago
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Gene mutations can be positive, negative, or neutral. Suppose that the normal gene in Model 2 produced a polypeptide that was ne
Zolol [24]

Gene mutations can be positive, negative, or neutral. Suppose that the normal gene in Model 2 produced a polypeptide that was necessary for cellular respiration.

A) Choose a mutation from those in Model 2 that might be positive for a cell. Explain your reasoning by relating the mutation to the cellular respiration process.

Genes encoded in our DNA result in the production of proteins that perform specific functions  within human's cells and various environmental factors and spontaneous events can lead to changes in genes, these changes are called mutations, can lead to alterations in the structure and activity of the proteins in the cells use. Mutations are the source of all new alleles in nature and arise spontaneously at low frequency owing to the chemical instability of purine and pyrimidine bases and to errors during DNA replication. Therefore,a gene mutation is a change in the sequence of nucleotides that occurs during cell replication  (mitosis and meiosis) within a single coding section of DNA. Variations in alleles lead to variations in organisms  within a population, cellular respiration, i.e. the reduction of inspired oxygen to water, which powers cell function, also generates highly reactive oxygen species that can damage DNA, with the purine bases G and A being particularly susceptible to this kind of attack,so Positive mutations lead to the organism having a better chance of survival, which  means the mutation may be passed on to the offspring.

B) Choose a mutation from those in Model 2 that might be negative for a cell. Explain your reasoning by relating the mutation to the cellular respiration process.

Due to one's metabolism, the human body replaces every cell within the cellular respiration process and any mistakes can also occur in the  transcription of mRNA or the translation of a polypeptide. However, these changes are considered to be negative mutations, because they are not permanent changes to the cell, however such mutations may lead to an early death probably before the organism can produce offspring.

3 0
3 years ago
Lamarck's hypothesis of evolution was based on which theory?
zheka24 [161]
Lamarck's hypothesis of evolution was based on the theory of acquired inheritance.
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4. What is the difference between cytology and histology?
-BARSIC- [3]

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C. Cytology is the study of cells, while histology is the study of tissues.

Explanation:

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Why do prokaryotes reproduce faster than eukaryotes?
JulijaS [17]
Prokaryotic cells reproduce asexually which makes it easier for them to multiply because all they have to do is split in half where as eukaryotic cells reproduce sexually so they have to find another cell to meet with in order to reproduce.
6 0
3 years ago
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