Ans. (D). T cells.
Immune responses are reactions of immune cells and substances against foreign substances or abnormal cells.
Specific immune responses are elicited by adaptive immune system, which is made up of T-lymphocytes and B-lymphocytes. These cells are highly specialized that function in elimination of pathogens and prevent their growth.
Thus, the correct answer is option (D).
Geothermal and solar energy both have a mining step, while nuclear energy does not.
b.
Geothermal and solar energy both require water, while nuclear energy does not.
c.
Geothermal and solar energy are both renewable, while nuclear energy is not.
d.
Geothermal and solar energy both generate a significant amount of waste, while nuclear energy does not.
in short the answer is c.
The correct answer is option B
The mammals are further classified into groups in terms of development of the offspring. There are various types of mammals that development in different way.
Placental Mammals:
The embryo grows inside the body of the mother by the help of placenta which aids in the nourishment of the embryo. After birth, the mother cares for the young ones.
Marsupials:
They lack placenta and in place of placenta they have marsupium that provides nourishment to the young ones after birth. This is a pouch found in the body of the mother which acts as the protective covering of the embryo in which further development of the young ones takes place.
Monotremes:
These kind of mammals lay eggs, eggs are hatched and the young ones lick the milk from the abdomen of the mother.
B.) coral bleaching
C.) ocean acidification
D.) oligotrophic
Increased sea surface temperature has the potential to kill vast areas of coral because of the coral bleaching.
Bleached coral Healthy coral Coral bleaching is the process when corals become white due to various stressors, such as changes in temperature, light, or nutrients.
When water is too warm, corals will expel the algae (zooxanthellae) living in their tissues causing the coral to turn completely white. This is called coral bleaching. When a coral bleaches, it is not dead.
Coral bleaching can be caused by a wide range of environmental stressors such as pollution, oil spills, increased sedimentation, extremes in sea temperatures, extremes in salinity, low oxygen, disease, and predation.
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Answer:
B.) Coral Bleaching
Explanation:
Increased temperatures can cause coral to 'bleach' or lose their symbiotic zooxanthellae algae
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Explanation:
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Answer;
Limiting factor.
A finite resource in the environment that keeps a population from steadily increasing is known as Limiting factor.
Explanation;
If the presence or absence of a factor limits the growth, abundance, or distribution of the ecosystems elements, it is called a limiting factor.
There are several abiotic factors (non living factors) that limit ecosystem growth, including temperature, precipitation, sunlight, soil configuration, and soil nutrients.