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mrs_skeptik [129]
2 years ago
6

Which statement best describes how speciation occurs?

Biology
1 answer:
Zepler [3.9K]2 years ago
5 0
The answer is A, A gene flow brings new in new alleles increasing variation within the population of spring
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The gastric phase of gastric secretion is triggered by the:
Anvisha [2.4K]

Answer:

The entry of food into the stomach.

Explanation:

Gastric secretion is triggered by the act of eating which is called as reflex phase and the entry of food into the stomach called a gastric phase. The entry of the food particles into the small intestine also helps to control the secretion of gastric called an intestinal phase.

The secreted fluid in the small intestine contains some ions, acids, etc such as pepsinogen, intrinsic factor, bicarbonate, hydrochloric acid, and mucus. The reflex phase or cephalic phase helps to stimulate parasympathetic neurons that release acetylcholine chemical, then it produces the higher secretion of gastric juice.

6 0
3 years ago
A land developer and several ecologists are discussing how a parcel of private land should be developed with housing while savin
FromTheMoon [43]

Options for the question have not been provided. They are as follows:

A) The single intact parcel would have a smaller amount of edge than the 20 separate parcels.

B) The isolated hectare plots increase the ability of individuals to disperse from one habitat to another.

C) The separate 1-hectare plots are less vulnerable to edge effects.

D) The large plot will create more inbreeding in many species.

Answer:

A) The single intact parcel would have a smaller amount of edge than the 20 separate parcels.

Explanation:

In the given case, 20 hectares of land has been allocated to natural habitat. This means that natural flora and fauna will flourish here without any human interference. In this situation it is better to have an intact 20 hectares area at one side of the land, rather than having 20 separately spread out 1 hectare areas. This is because having one large piece of land at one side will reduce the edge effect.

Edges occur where two different habitats meet. While edges can be beneficial when it comes to natural habitats because the boundary habitat increases overall biodiversity, it can be detrimental when the edges are due to human settlements. It will be difficult to avoid human interference as the natural habitats are scattered among human settlements. Each individual plot will also get less area due to which it will be difficult for all the species to accommodate comfortably. Many animals can venture out in search of food which can be dangerous to both animals and humans. It is better to have a big separate land at one corner so that everyone can survive peacefully.

3 0
3 years ago
Which occurs in both the lytic cycle and the lysogenic cycle
katen-ka-za [31]
The correct answer is
>> <span>hijacking of host cell's metabolic action <<
make me happy please 

</span>
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3 years ago
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What is the last step of a scientific investigation?
aleksandr82 [10.1K]

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its c

Explanation:

communicating the result is significant to analyzing data

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2 years ago
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Plant cells are different from animal cells. The diagram below identifies four different structures in a plant cell. Compared to
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B.cell wall , hope this helps
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3 years ago
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