What initiates flowering in long-day plants?
A) nights shorter than a critical length
B) nights longer than a critical length
C) days longer than the nights that are in between them
D) days shorter than a critical length
Answer: A
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Continental crust is older than oceanic crust
Indicate whether the statement is true or false
In animals with a brain, the two major divisions of the nervous system are the
a. autonomic and peripheral systems. b. central and peripheral nervous systems. c. brain and spinal cord. d. nerves from the brain and the peripheral systems. e. cranial and spinal nerves.
In order to successfully grow pure bacterial culture in a laboratory, the following techniques have to be applied.
A) sterilization. B) aseptic techniques. C) making suitable medium for the culture. D) B and C. E) A and B and C.
The layer where organisms can exist on the surface of the earth is the
(a). biosphere. (b). ecosystem. (c). population. (d). homeostasis. (e). community.