A cytologist is examining a tissue under an electron microscope. He notices in particular that the endoplasmic reticulum of each cell is extremely rough in appearance and of course knows that the rough appearance is because of the ribosomes embedded there. He is curious about why there are so many ribosomes. You can help. Your response would be,

What is the process of a new plant growing from its seed into a seedling? primary growth fertilization pollination germination

Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and descendants and depicting the relationships in a cladogram. which of the following best describes a challenge in classifying organisms this way? a. there are millions of species on earth, and a cladogram is not a practical means for classifying all of them. b. it is impossible to tell which organisms are most closely related to each other using a cladogram. c. cladograms are detail-oriented and do not provide a useful understanding of evolutionary relationships. d. there is a limited number of ways to organize the information, so most cladograms end up looking very similar.

Which of the following statements is accurate about evolution? question 10 options: natural selection only eliminates odd individuals. evolution means that a population never has changes in its genetic frequencies. mutations are always harmful. evolution means that a population undergoes changes in its gene frequencies over time.