The first photosynthetic organisms to obtain hydrogen by splitting water were the cyanobacteria
__________ Indicate whether the statement is true or false.
T
You might also like to view...
The notochord forms from which type of tissue?
a. ectoderm b. endoderm c. mesoderm d. chorion e. amnion
A city was intensively sprayed with the chemical DDT to control houseflies. The number of houseflies was immediately greatly reduced
Each year thereafter, the city was sprayed again, but the flies gradually increased in numbers until 10 years later when they were as abundant as they were before the control program began. Provide an evolutionary explanation of what happened.
Before a stoma opens:a
the level of carbon dioxide inside the leaf increases. b. potassium ions are actively transported out of guard cells. c. potassium ions are actively transported into guard cells. d. the turgor pressure inside the guard cells decreases. e. water moves by osmosis out of the guard cells.
If you were to study all of the insect-eating birds in a forest, you would see that many birds eat insects,
yet you may not see any evidence of competition. What is the most probable explanation? a. The birds have coevolved. b. The birds are exhibiting resource partitioning. c. The birds are exhibiting intraspecific competition only. d. There is no keystone species in this community. e. There is not enough species richness to see evidence of competition.