Answer:
The correct reason would be "the levels of dissolved oxygen at the mouth of the river and at the source of the river".
The mouth of the river is the region where it flows into the ocean, lake, another river, reservoir, sea et cetera. The level of dissolved oxygen in this region is too low to support great biodiversity.
Organisms like catfish and carp can survive here due to their low oxygen demand. For example, catfish can survive in water with an oxygen content of 2.5 parts per million.
In contrast, the level of dissolved oxygen is higher at the source of the river. Organisms like trout are found here due to their high oxygen need. For example, rainbow trout require minimum 5-6 parts per million dissolved oxygen for its survival.
The movement caused by warmer fluids rising and cooler fluids sinking is called convection currents.
The convection currents are the outcome of differential heating. The less dense, that is, lighter warm substances rise, while the denser, that is, heavier cool substance sinks. It is this movement that generates patterns of circulation called convection currents, in water, in the atmosphere, and in the mantle of the Earth.
Thus, convection currents are the answer.
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Answer:
Explanation:
convection current
B. meiosis.
C. crossing-over.
D. replication.
Meiosis (reduced division), in which a germ cell splits into two pieces and produces four gametes, is the process by which gametes are created, hence option B is correct.
Male and female gametes combine during fertilization to create a diploid (i.e., having paired chromosomes) zygote.
Sex cells are used in the cell division process known as meiosis. To create four haploid daughter cells, a single diploid sex cell splits twice (meiosis I and meiosis II).
Given that the number of chromosomes in the parent cell is cut in half during meiosis, the process is frequently referred to as reductional cell division.
Haploid cells in plants result in haploid gametophytic generations, also known as gametophytes. Gametes eventually develop from the gametophytes.
Therefore, gametes are produced by the process of meiosis.
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Just took the test the answer is B.
It’s a sugar found in RNA but not in DNA
Answer and Explanation:
3(2 + y) is the answer.
The 3 is multiplying the 2 and y inside the parenthesis.
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The answer is the Sympathetic nervous system as a Group of answer choices central endocrine sympathetic somatic parasympathetic shows these symptoms.
The sympathetic nervous system is a part of the self-sustaining fearful device which controls the involuntary frame capabilities such as coronary heart rate, breath rate, perspiration, etc. The sympathetic is in particular answerable for the boom withinside the feature of frame capabilities while the frame perceives a risk. When confronted with a risk or distress, the sympathetic nervous system initiates physiological reactions called the “combat or flight” response, thereby growing the frame’s alertness to such risk. Examples of improved frame capabilities or “combat or flight response” consist of improved perspiration and improved coronary heart rate, as exhibited via way of means of Blair.
The sympathetic nervous system directs the body's speedy involuntary reaction to risky or disturbing situations. A flash flood of hormones boosts the body's alertness and system coronary heart rate, sending greater blood to the muscles.
Hence conclude the sympathetic nervous system is the answer.
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Answer:
sympathetic nervous system
Explanation:
The sympathetic nervous system is part of the autonomous nervous system which controls the involuntary body functions as heart rate, breath rate, perspiration etc. The sympathetic nervous system is specifically responsible for the increase in the function of body functions when the body perceives a threat. When faced with a threat or distress, the sympathetic nervous system initiates physiological reactions known as the “fight or flight” response, thereby increasing the body’s alertness to such threat. Examples of increased body functions or “fight or flight response” include increased perspiration and increased heart rate, as exhibited by Blair.