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Anna71 [15]
3 years ago
11

Among vertebrates, the unique feature of lampreys and hagfish is the ________. among vertebrates, the unique feature of lampreys

and hagfish is the ________. absence of jaws absence of a postanal tail absence of a backbone presence of a cartilaginous skeleton
Biology
1 answer:
marshall27 [118]3 years ago
5 0
The correct answer is absence of jaws.
Lampreys and hagfish are in the class Agnatha, they are jaw-less fish. The members of the agantha class are probably the earliest vertebrates. Scientists have found fossils of agnathan species from the late Cambrian period that occurred 500 million years ago. 

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The process that enables cells of the body to burn food and release energy is called
serg [7]

...respiration!

Respiration is the biochemical process in which the cells of an organism obtain energy by combining oxygen and glucose, resulting in the release of carbon dioxide, water, and ATP (the currency of energy in cells). Source: https://study.com/academy/lesson/what-is-respiration-definition-process-equation.html

I hope that helps! :)

4 0
3 years ago
What are the three basic characteristics of all cells and organisms?
Butoxors [25]
They have a cell membrane, they contain cytoplasm and can replicate themselves through the manner of mitosis. 
3 0
3 years ago
Match each part of Sammi's model to the bodily structure it represents. One bodily structure has already been labeled for you.
KiRa [710]

Answer:

corrugated cardboard tube - digestive tract

irregular surfaces on the corrugated tube - villi

pump - heart

Plastic tubing - blood vessels

Explanation:

The corrugated cardboard tube represents the digestive tract.  The give away was the presence of the irregular surfaces within the tubes. This is called the villi. The villi is responsible for the absorption of food after digestion into the body.

Irregular surfaces on the corrugated tube represent the villi. They are tiny hair-like structures that are in the small intestine, that are responsible for the absorption of food into the bloodstream.

The pump represents the heart. The heart is the only organ in the body that provides the pressure force that pushes the blood throughout the body. In this model, the pump will most likely be performing the same function.

The plastic tubings are meant to contain one form of fluid or the other. Judging from that, they can be said to represent the blood vessels. This is because they are connected to the heart and are meant to transport bodily fluids around the body

4 0
3 years ago
Which element is found in nucleic acids but not in amino acids
Sergio039 [100]

Answer:

Phosphorus

Explanation:

idk amino acids contain carbon hydrogen oxygen and nitrogen as well as sulfur sometimes

nucleic acids contain phosphorus as well as carbon hydrogen and nitrogen

4 0
3 years ago
To investigate the possible presence of introns in three newly discovered genes (X, Y, and Z), you perform an experiment in whic
REY [17]

Answer:

a). At least one intron must be present in gene X.

b). At least two intron must be present in gene Y

c). It is impossible to determine whether there are any introns in gene Z.

Explanation:

Introns may be defined as the segments in the RNA molecule or the DNA molecule that does not code for proteins and they interrupts the sequences of each of the molecules.

In the context, we get :

a). In the gene X, at least one of the intron is present. Sometimes more than one introns may also be present. Due to slicing, we get one band less in the cDNA which is made from the mRNA.

b). In dene Y, at least one intron is present. Sometimes more than one introns are present inside the gene Y. In this case we get two bands less in the gene due to slicing.

c). In gene Z, it is not possible to determine the number of introns present in them. In genes X and Y, the Haelll enzyme is present in the intron. Therefore we get less of band after splicing the mRNA to cDNA.

6 0
3 years ago
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