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GaryK [48]
2 years ago
5

The double-lobed mass of tissue located in the mediastinum along the trachea behind the sternum that is involved in immunity is

known as the
Biology
1 answer:
Vesna [10]2 years ago
5 0

Answer:

The correct answer is thymus gland.

Explanation:

In the immune system, the thymus is considered as a primary lymphoid organ. Thymus is present behind the sternum, above the heart and between the two of our lungs. It is made up of two-lobed and is involved in releasing hormones and providing immunity.

Thymus is the primary site where T- cells become mature. T- cells are formed in bone marrow but reaches to thymus for maturation. These mature T- cells play a very important role in providing adaptive immunity against foreign molecules.  

Thymus is larger till puberty and it slowly shrinks as the age increases. So the correct answer is thymus.

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In most vertebrate neurons, an action potential arrives at the axon terminal and causes the release of chemical messenger molecu
erik [133]

The correct answer is option d, that is, neurotransmitters.  

A neurotransmitter refers to a chemical component, which is discharged at the terminal of a nerve fiber by the introduction of a nerve impulse, and by diffusing across the junction or synapse. It helps in the transfer of the impulse to another muscle fiber, nerve fiber, or some other composition. Acetylcholine is a kind of neurotransmitter, that is, used by neurons in the CNS and the PNS in the control of activities ranging from heart rate and muscle contraction to digestion and memory.  


5 0
3 years ago
An organism is homozygous dominant for one trait and heterozygous for another. What is the probability of the organism producing
adell [148]

Answer:

C.1 out of 2

Explanation:

The probability of the organism producing a gamete with one dominant allele and one recessive allele for these trait is 2 out of 4 which can be further reduced to 1 out of 2.

For a cross between Homozygous and heterozygous individual we will get 2 homozygous and 2 hetrerozygous individual. The heterozygous individual has one homozygous allele and one heterozygous allele

4 0
3 years ago
Read 2 more answers
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dedylja [7]

Answer:

show the full thing

Explanation:

i cant see it

6 0
3 years ago
What is the nature of the majority of the water on Earth?
kvv77 [185]

Answer:

D: salty

Explanation:

The Majority of the earth is made of the ocean

i'm not sure this is correct tho

7 0
3 years ago
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If you think of the earthworm body plan as a drinking straw within a pipe, where would you expect to find most of the tissues th
Otrada [13]

Option (A) lining the straw is correct.

<h3>What is the anatomy of Earthworm?</h3>
  • An earthworm is a terrestrial invertebrate and a member of the phylum Annelida.
  • They have a tube-within-a-tube body structure, corresponding external and internal segmentation, and typically include setae on each segment.
  • They can be found wherever the soil, water, and temperature permit.
  • The body of an earthworm is composed of a digestive tube and a thick cylindrical muscular tube that forms the body.
  • The body is divided into segments, and furrows on the surface of the body serve as markers for the segment boundaries.
  • The top of the first segment, which encloses the mouth, is a lobe made of muscle and flesh.

Learn more about Annelida here:

brainly.com/question/28099509

#SPJ4

5 0
2 years ago
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