Which of the following animals have a central nervous system? Those that are cephalized Those that are radially symmetrical Those that are slow moving and sessile Those that are cephalized and radially symmetrical None of the above

The correct answer is: A) Those that are cephalized.

Explanation:

The Central Nervous System is only present in animals that are cephalized, capable of moving, and have bilateral symmetry.

Cephalized animals have a proper region in their front end in which the mouth, the sensory organs and the nerve ganglia concentrate and form a "head".

An animal with bilateral symmetry has a single plane of symmetry (the sagittal plane) which divides the body into two halves: one left and one right.

Animals that are radially symmetrical exhibit a pattern around their central axis that repeats itself up to 8 times. A good example of a radially symmetrical animal is a starfish.

the most logical answer would be a

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion