What type of instrument measures seismic waves? A. Mercalli scale
B. Seismogram
C. Seismic scale
D. Seismometer

Answers

Answer 1

Answer: the answer is D. seismometer

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Folded membranes are an advantage to a cell because ?

Answers

Folding the membranes increases the surface area of the cell, which increases the number of absorption or reaction cites

which type of mutation is responsible for sickle cell anemia .A inversion B substitution C insertion D deletion

Answers

the type of mutation that is responsible for sickle cell anemia is substitution

What must be present for the araC gene to be activated?

Answers

The araC gene is associated with the arabinose operon in bacteria, such as E. coli. For the araC gene to be activated, the presence of arabinose is crucial. AraC is a regulatory protein that can act as both an activator and a repressor, depending on the presence or absence of arabinose.

In the absence of arabinose, AraC represses the ara operon. When arabinose is present, it binds to AraC, causing a conformational change in the protein. This altered form of AraC then acts as an activator, promoting the transcription of genes in the ara operon.

So, in summary, arabinose is the key inducer required to activate the araC gene and initiate the expression of genes in the arabinose operon.

Why do dead plants decompose slowly in marshes?

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Marshes refers to a place which has low land and prone to floods. Since it is always wet, dead plants slowly decomposes on this area because it has lesser bacteria or decomposes that helps the plants to decompose faster.

Weightlifters are often concerned with the amount of protein in their diets because growing muscles require protein. Just as muscles need the basic building block of protein, protein itself also has basic building blocks. Which of the following are the building blocks of protein?

Answers

Amino acid is the basic building block of proteins; when linked together, amino acids form specific proteins. There are more than 50 known amino acids, but only 20 are used in making proteins and only 9 are considered essential.

Plants lean toward the light because of plant hormones called