The curve on the left shows the height of a population of penguins the curve on the right shows the population five years later what has happened to this population?
a. stabilizing selection
b. disruptive selection
c. directional selection
d. polygenic selection

Which sentence best describes the relationship between chlorophyll and the chloroplast? a.) chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

Prokaryotic and eukaryotic cells are different in many ways other than the presence or absence of a nucleus. if both archaebacteria and eubacteria are prokaryotic cells, then why are archaebacteria more closely related to eukaryotic cells than they are to eubacteria?