A flower can generate an embryo through self-fertilization. What statement best describes the process of self-fertilization in the flower?

A.

An egg produced by the ovary falls onto the anther, causing pollen on the anther to project a pollen tube. When the tube reaches the egg, the male gamete fertilizes the egg, which then falls to the petal.

B.

Pollen produced by the anther falls on the stigma, and projects a pollen tube that grows through the style. The pollen tube pierces an ovule in the ovary, and the male gamete fertilizes the egg of the ovule.

C.

An egg produced by the filament falls onto the stigma, and then travels down the style to the ovary. A male gamete from pollen in the ovary fertilizes the egg.

D.

Pollen produced by the stigma falls on the anther. The pollen travels down the filament until it reaches an ovule in the ovary, where the male gamete is fertilized.

B.  

Explanation:

Self-fertilization is the process of fertlization in flowering plants in which same flower or plant produces both male and female gametes.In flowering plants pistil is called the female part containing stigma, style, ovary and ovule while stamen is the female part consisting anther and filament..

During self-fertilization in angiosperms, a pollen from anther (male organ) reaches stigma (part of female organ) of the same flower, and develops a pollen tube which direct to an ovule present in the ovary. The pollen grain the fertilises the egg in the ovule and produces and embryo in the same plant.

Hence, the correct option is B.

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

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.