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slega [8]
3 years ago
10

Which of these activities requires the use of a material resource?

Biology
1 answer:
xxMikexx [17]3 years ago
4 0

Answer:

I think its manufacuting steel Have a great day

Explanation:

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Explain how it is possible for nutrients to be transported to the cells of a flatworm with no circulatory system.
Alisiya [41]

Answer:

Flatworms are beings that do not have a heart, veins, arteries, capillaries, hemolymph, or some type of circulatory fluid. Their circulation occurs between cells or intercellularly and they are responsible for transporting substances by diffusion from cell to cell.

Explanation:

Flatworms are considered multicellular eukaryotic organisms. This implies that in their cells they have a cellular nucleus, in which the DNA is contained, structuring the chromosomes. Likewise, they are made up of several types of cells, each one specialized in a specific function. They lack a structured circulatory system as such. Because of this they do not have specialized structures such as a heart or blood vessels, however, the circulation of certain substances is established between their cells. This is done thanks to the diffusion process. Substances pass from one cell to another through this process.This does not apply to all flatworms, since in some species of bog and digenae there is a certain organization and some very small conducting vessels known as the endolymphatic system, the which forms a kind of plexus in the parenchyma.It should also be noted that some species do not even have a digestive system, being the digestive tract the one in charge of digestive functions and the distribution of the nutrients they receive.

5 0
3 years ago
Which sentence describes a sex-limited trait?
myrzilka [38]
The answer would be the first one
8 0
3 years ago
Read 2 more answers
Genetic recombination in bacteria can happen during (name two possibilities)
Sergio [31]

Answer:

During transformation and conjugation

Explanation:

Transformation is a process whereby genetic material from another species is  introduced into the bacteria through a series of biological steps and manipulation. Conjugation is when the exchange of the genetic material is between bacterial species through a conjugation tube.

7 0
3 years ago
What is the purpose of the G1 and G2 phases?
wel

Answer:

Explanation:The G1 and G2 phases are times of growth and preparation for major changes. The synthesis phase is when the cell duplicates the DNA in its entire genome. The three phases of interphase also allow for checkpoints to ensure that things are working properly.

3 0
3 years ago
Lisa is in the eighth grade. Normally she is active in clubs, plays sports, and gets good grades, but lately she hasn’t been fee
Monica [59]
Whats the question here?? are you asking which disease she has????
6 0
3 years ago
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