Within a species of short, ground-dwelling animals, two parents produced a group of offspring that were 1 cm taller than they were. these offspring were able to reach slightly higher vegetation than their parents and other members of the species. when the offspring grew up, they produced new offspring who were also slightly taller and could also reach the higher vegetation. this process continued over several generations such that offspring became gradually taller with time.
eventually, after many generations, all members of the species were at least 20 cm taller than the original two parents that produced the slightly taller offspring. what does this illustrate?
a.
slight differences between parents and offspring can eventually result in future generations that are very different from their ancestors.
b.
ground-dwelling animals would survive better if they evolve to be shorter.
c.
only major differences between parents and offspring can result in future generations that are very different from their ancestors.
d.
biological change does not apply to ground-dwelling animals.

A. Slight differences between parents and offspring can eventually result in future generations that are very different from their ancestors.

Explanation:

B is not correct because the animals were getting taller, not shorter. C is not correct because there were not big differences between the parents and their offspring. D is not correct because in the example the ground-dwelling animals underwent biological change.

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

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.