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Vinvika [58]
3 years ago
9

Which of the following countries currently contributes the most lumber to the international market?

Biology
1 answer:
Fiesta28 [93]3 years ago
5 0

Answer:

Canada

Explanation:

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If the DNA sequence TTCACG is transcribed to AAGGC, what type of mutation has occurred? A. Deletion B. Substitution C. Insertion
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Deletion !! is the answer
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Is a tomato plant a single cell or multicellular? Explain with strong evidence It is for my science class
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Answer: Tomato plant is a multicellular organism.

Explanation: A multicellular is a organism composed by many types of cells or cell lines. A tomato plant is composed not only by million of cells but by many types of them in the different tissues and organs, for example, leaves have epidermic cells that protect them, stomata cells for gas exchange, chlorenchyme cells that have chloroplasts to do photosynthesis, phloem and xylem cells to transport fluids, etc.

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Why are there no small organisms in the bathyal zone?
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There are no known organisms because of the lack of sunlight necessary for photosynthesis to produce these organisms

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7 0
2 years ago
What is the function of the hormone erythropoietin?
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stimulates production of red blood cells is a correct answer.

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function of the hormone erythropoietin: stimulates production of red blood cells

Erythropoietin hormone is produced by the kidney and its function is to promotes or support the formation of the red blood cells and to provide protection to the cells from the destruction.

Erythropoietin hormone stimulates the bone marrow to produce red blood cells and the function of the red blood cells is to transport oxygen to the body.

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3 years ago
Each biological species is genetically isolated from other species. why do the species evolve independently?
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Species evolve independently possibly due to geographical isolations or behavioural isolations.

Geographical isolation includes the isolation of 2 groups of the same species. Since these 2 groups live in different locations, (e.g. a volcanic eruption resulting in a barrier between one side of an ocean and another side of the ocean), they will have different selection pressures in their different environments as well (e.g. one side of the ocean may have more sunlight and thus more underwater plantations than the other side of the ocean). Natural selection will eliminate those with disadvantageous characteristics (e.g. Fishes that only eat plants and nothing else on the side of the ocean with little plantations) with unfavourable alleles, and select for those with advantageous characteristics (e.g. Fishes are able to eat plants and other organic substances as well on the side of the ocean with little plantations) with favourable alleles.

Since the 2 groups have different selection pressures, natural selection will occur in different ways, selecting for and against different types of fishes with different types of alleles. Also, because of the barrier, they are not able to mate with each other, and there are no mixing of genes from one side of the ocean and the other side. They are genetically isolated. As genetic drift occurs over time, their gene pools become different from each other. Thus, they evolve independently.

Hope this helps! :)
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