Prokaryotes do not have organelles. So no nucleus.
They do have organic molecules, DNA and a cell membrane.
Answer:
c. Directional selection
Explanation:
There are three types of selection: stabilizing, directional and disruptive. Currently seed cracker finches show disruptive selection with respect to bills. In disruptive selection two extreme phenotypes are preferred in population over the mean phenotype. Here either, small or large bills are beneficial for birds so it is an example of disruptive selection.
If due to some climatic change all seeds would become hard, it would be more beneficial for birds to have large bills. Slowly nature will select for birds with large bills rather than birds with small bills. The selection now will shift to directional selection since only one of the extreme phenotypes is being favoured.
Answer:
B. kinetic energy
Explanation:
Kinetic energy is the energy of movement. Thermal energy is the energy of heat. The hotter a compound gets the more space the molecules have, this allows for increased movement.
Cells make up the tissues which combine to form the organs and then different organ systems make up the organism
so it's cells-tissues-organs-organ system-organism
