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3 years ago

A stem growing up and out of the soil, away from gravity is an example of a _______.

1 answer:

5 0

A tropism is a movement of an organism toward or away from a stimulus. A positive tropism is when the organism moves toward the stimuli. A negative tropism is when the organism moves away from the stimuli. So, your answer will be negative tropism, since the stem is growing up and out of the soil, AWAY from gravity.

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Dermal layer made of dead cork cells

Elena L [17]

Correct, sorry i dont know what your asking

6 0

3 years ago

A disease was caused by a bacterium; you want to produce a biological product to kill this bacterium. Which product you have to

makvit [3.9K]

Answer:

The product that must be produced to kill a bacterium —which causes a disease— is an antibiotic, which through biotechnology can investigate the structure of the bacterium and synthesize the chemical formula needed to produce antibiotics in high amounts.

Explanation:

Antibiotics are specific medicines for the treatment of infectious diseases, produced by bacteria. Antibiotics can kill bacteria and prevent their replication.

If a disease is produced by bacteria, the product that is necessary to kill those microbes is an antibiotic, for which biotechnology is useful.

By using biotechnology —a branch of biology that uses technology as a research and development tool— it is possible:

Know the structure, functions and behavior of pathogenic bacterial strains.
Create chemical formulas -antibiotics- that serve to effectively eliminate bacteria, and cure infectious diseases.
The synthesis and production of antibiotics on a large scale, allowing their sufficient availability for use.

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3 years ago

Beginning with a cell that just fertilized ( 1 cell ) how many times must it divide to become a 64 cell blastomere ?

natka813 [3]

A cell that just fertilized has to divide 6 times to form a 64 cell blastomere.

Explanation:

Human reproduction begins with the fusion of male gamete sperm and female gamete ovum. The fusion of sperm and ovum forms the zygote that is diploid. The zygote then undergoes mitotic division to develop into embryo.

The zygote first divides into two and the two individual cells divide again to form four individual cells and so on. Thus the number of cells after each division can be represented by the equation $2^n$ where n is the number of divisions. in the question it is given that the blastomere has 64 cells.

$2^n=64$

n=6

This means that the fertilized cell has to divide 6 times to develop into 64-celled blastomere.

7 0

3 years ago

What are seismic waves?

Len [333]

Answer:

an elastic wave in the earth produced by an earthquake or other means.

Explanation:

earthquake, surface

primary wave

;)

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3 years ago

Microorganisms can mutate and evolve very quickly compared to most multicellular organisms. This allows pathogenic microorganism

kodGreya [7K]

Most likely, it would effect many trees depending on the rate of infection and how much of this microorganism is released to the environment. I hope that helped :)

6 0

3 years ago

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