Answer:
centriole meaning center found near the nucleus of animal cells occurring in pairs and involved in the development of spindle fibers in cell division.
Explanation:
B. A camel has two rows of eyelashes to keep sand out of its eyes.
The infant should be given a trial of bronchodilators.
Explanation:
Bronchodilators are compounds that dilates the bronchioles and smoothens the flow of air through them.
The infant has gonorrhea and cough. This shows that he has excessive mucus secretion in his respiratory tract.
Wheezing and prolonged expiration shows that the infant is having breathing difficulty.
Wheezing usually occurs when there is a blockage in the bronchial passage.
Since immunizations are up to date, chances of probable infections are less.
In this case the physician should use a bronchodilator trial to check if the blockage in the bronchus is due to mucus.
Then any further examination should be followed.
Answer: Spinal cord.
Explanation:
The spinal cord of the central nervous system helps to move off quickly as a part of the reflex response. Jill stepped on a tack and suddenly he realizes that he should quickly move his legs out of the tack.
The pain is not stimulated until the signals reaches from the receptor to the brain. The formation of the reflex arc ensures that the amount of potential tissue damaged is less.
It forces the body to move quickly from the place that is causing damage.Example: Moving the leg up involuntarily when stepped on pin.
This occurs because the sensory neurons connects to the motor neurons within the spinal cord.This leads to the contraction of bones and muscles.
Hence, the correct option is spinal cord.
Answer:
Directly affects.
Explanation:
Climate, resources, and habitat size directly affect carrying capacity of an ecosystem. Favourable climatic and environmental conditions increases the population of organisms to its maximum limit. More resources leads to increase in population of species in an ecosystem until carrying capacity. Habitat size also depends on carrying capacity which means higher carrying capacity can leads to bigger habitat size. Climatic change, Habitat destruction, introduced and invasive species and genetic pollution are factors that effect both biodiversity and population. Human activities causes pollution, destruction of habitat by cutting trees etc affects biodiversity.