Answer the following questions true (T) or false (F)
1. The intrinsic rate of increase of a population is usually referred to as "r."
2. The intrinsic rate of growth of a population is calculated by adding the death rate and the birth rate.
3. Most r-selected species are small and short lived.
1. TRUE
2. FALSE
3. TRUE
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How do the nervous systems of cnidarians and arthropods differ?
What will be an ideal response?
If a plant is kept in the dark
A) the stomata continue their daily rhythm of opening and closing. B) the stomata will remain closed the entire time that the plant is in the dark. C) the stomata will remain open the entire time that the plant is in the dark. D) the guard cells will open as water is added.
The basis of the immune system is:
a. direct cell to cell contact. b. distinguishing between self and nonself. c. communicating between cells. d. producing antibody action. e. attacking invading objects.
Which statement best summarizes the differences between osmosis and diffusion?
A) Osmosis deals only with acidic liquids. B) Osmosis deals only with water. C) Osmosis deals only with alkaline liquids. D) Diffusion deals only with alkaline liquids. E) Diffusion deals only with water.