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Mashutka [201]
3 years ago
15

1. The bronchi and alveoli organs are part of which organ system?

Biology
1 answer:
Anastaziya [24]3 years ago
4 0

Answer:

respiratory system

Explanation:

The bronchi become smaller the closer they get to the lung tissue and are then considered bronchioles. These passageways then evolve into tiny air sacs called alveoli, which is the site of oxygen and carbon dioxide exchange in the respiratory system.

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A researcher is trying to construct a molecular-based phylogeny of the entire animal kingdom. Assuming that none of the followin
faust18 [17]

Answer:

Collagen genes.

Explanation:

Phylogenetics helps to study the evolutionary relationship among the different group of organisms. The different characteristics like DNA sequences, mitochondria sequences can be used for the construction of phylogeny tree.

Collagen genes can be used to study the evolutionary relationship as mammals contains nearly 30% of total protein. The collagen gene shows the most of the conserved sequences among the different group of organisms and shows the most recent evolved characters in vertebrates.

Thus, the correct answer is collagen genes.  

3 0
3 years ago
Particles that "orbit" the center of an atom are called *
Leona [35]

Answer:

protons and neutrons

Explanation:

loki

5 0
3 years ago
Describe the genetic code and its relationship to polypeptides and proteins
konstantin123 [22]

The genetic code is directly related to polypeptides and proteins in the sense that genes are decoded to synthesize proteins.

What is the genetic code?

Genetic code is the set of rules by which the sequence of bases in DNA are translated into the amino acid sequence of proteins.

The genetic code is unique for living organisms and is used to synthesize the proteins that is responsible for various activities in living organisms.

The genes in the genetic code are first transcribed into mRNA, which is then translated into proteins (polypeptides).

Learn more about genetic code at:

#SPJ12

6 0
2 years ago
As part of a purification technique, a mixture of small-protein hormones and peptides are placed in a gel and exposed to an elec
lidiya [134]

Answer:

The correct answer is "negative".

Explanation:

At pH 2 the net charge of the R groups of all the amino acids that comprise the peptide in question would be positive. This happens because of the high content of protons in a solution of pH 2, a value that is below the isoelectric point of all the amino acids. Since the peptide would have a positive net charge, it would migrate to the negative terminal of the gel because opposite charges attract each other.

7 0
3 years ago
Kelp can be described as . a. slow growing aquatic plants. . b. slow growing algae . c. fast growing fungi . d. fast growing alg
romanna [79]
Kelp can be described as <span>fast growing algae. The correct option among all the options that are given in the question is the fourth option or option "d". It is a unique kind of an algae that has the capability to grow 2 feet in a day under right conditions. I hope that this is the answer that has come to your great help.</span>
4 0
3 years ago
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