Frogs have 13 pairs of chromosomes. complete this model by writing in the correct number of chromosomes for the sperm, egg, and fertilized egg of a frog. then write in the type of cell division taking place in the two phases shown in the model.

Which type of stimulus do mechanoreceptors detect? sound pain heat light

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing