Answer:
false
Explanation:
Autotrophs, organisms that produce their own food, are the first trophic level. These include plants and algae. Herbivores, which eat autotrophs, are the second trophic level. Carnivores, organisms that consume animals, and omnivores, organisms that consume both plants and animals, are the third trophic level.
Answer:
D. Warm front
Explanation:
Warm fronts typically have warmer and more moist air than the air in front of it. Replacing the cold air with warm air can cause precipitation.
1) Birthrate. Because you need to accommodate for all the little humans on earth, whether that be housing or taxes and such. Plus we don’t want overcrowding in certain areas.
2) death rate. It’s important to look at the death rate of a population because it can show the condition quality of certain areas. If a place has a higher death rate or the rate increases too quickly, then that should signal that something is wrong.
Answer:
The correct answer is option - d. Production of primary spermatocytes.
Explanation:
The accessory cells or supporting cells present within the seminiferous tubules of reproductive system termed as the Sertoli cells. They play various roles in the body and reproductive system.
Sertoli cells make blood-testis barrier in adjacent Sertoli cells in the seminiferous tubules. These cells secrete different types of enzymes and hormones such as inhibin which are also secreted by ovary and placenta in females. Sertoli cells produce seminiferous tubular fluid to provide nutrition to the sperm. Apoptotic germ cells are timely eliminated by these cells.
Thus, the correct answer is option D. Production of primary spermatocytes.
Paleomagnetism is the study of the terrestrial magnetic field during rocks formation or geological processes. The correct option is D. <em>The study of the </em><em>magnetic qualities </em><em>of </em><em>ancient rocks.</em>
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Paleomagnetism is a branch of geology, and refers to the study of the terrestrial magnetic field registered at the moment of a rock formation or during subsequent relevant geological processes, such as metamorphism.
It is based on three basic assumptions:
- Axial geocentric dipole
- Record of the primary magnetic field
- Invariable record in time
The paleomagnetic analysis includes a series of control tools used to verify que acomplishments of these assumptions in the study area.
The correct option would be option <em>D. The study of the </em><em>magnetic qualities </em><em>of </em><em>ancient rocks.</em>
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