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Stells [14]
3 years ago
9

Which of the following statements about renewable resources is TRUE? A. They are only found in tropical climates. B. They can ne

ver be depleted. C. They are replaceable by natural means. D. They regenerate quickly.
Biology
1 answer:
nydimaria [60]3 years ago
3 0
The answer would be B.) they can never be depleted. Renewable resources are resources that are, unlike nonrenewable resources (i.e coal, oil, any other fossil fuels, etc.) cannot run out. Examples include sunlight, wind, and water (water never really runs out due to the water cycle).
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True or False. The complement system consists of several proteins that circulate in the blood and have the ability to enhance bo
nirvana33 [79]

Answer: False

Explanation: The COMPLEMENT SYSTEM consists of proteins synthesized in the liver. They are activated by inespecific harmful substance (antigen) and begins a cascade of proteins that finally forms an attack complex against bacteria.

The COMPLEMENT is part of the INNATE IMMUNITY, because it is an inherent response, something all humans born with, and it is part of the first defense barrier against any antigen. Part of the innate immunity are too: natural killer cells, neutrophils, monocytes, dendritic cells and macrophages.

On the other hand, the ADAPTATIVE IMMUNITY, is the response that the body develops after being exposed to an antigen before. It is like something that the body recognizes, and then "learns" how to act against it. Part of the adaptative immunity are: lymphocyte T and B, and the antibodies (substances called Immunoglobulins). The immunoglobulins (Ig) are glycoproteins present in the blood.

4 0
3 years ago
1. Describe the structure and function of each of the three types of RNA.
Ket [755]

Answer:

1.

mRNA - Messenger RNA: Encodes amino acid sequence of a polypeptide.

tRNA - Transfer RNA: Brings amino acids to ribosomes during translation.

rRNA - Ribosomal RNA: With ribosomal proteins, makes up the ribosomes, the organelles that translate the mRNA.

2.

Transcription is the process by which DNA is copied (transcribed) to mRNA, which carries the information needed for protein synthesis. Transcription takes place in two broad steps. First, pre-messenger RNA is formed, with the involvement of RNA polymerase enzymes.

3.

During translation, which is the second major step in gene expression, the mRNA is "read" according to the genetic code, which relates the DNA sequence to the amino acid sequence in proteins. Each group of three bases in mRNA constitutes a codon, and each codon specifies a particular amino acid (hence, it is a triplet code). The mRNA sequence is thus used as a template to assemble—in order—the chain of amino acids that form a protein.

Explanation:

6 0
3 years ago
If a chromosome comes apart because it is not well attached at the center, 1 point
UkoKoshka [18]

Answer: The most problem is likely with chromatin

Explanation:

6 0
2 years ago
How can fossils BEST help paleontologists and biologists classify organisms?
Papessa [141]
As it grows, it helps the follicles grow into roots which help people find out about the scientific knowledge of fossils.
5 0
3 years ago
Read 2 more answers
What goes where? I have no clue
mariarad [96]

The first one is atoms cause they are all the same type of particles. The blue one is the molecules that is not compound cause they aren't connected to each other. The other two are compound cause two atoms of two different elements are bonded together.

4 0
3 years ago
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