An ecological pyramid is a type of graph that can represent the amount of biomass, une allum
organisms at each trophic level in an ecosystem.
TERTIARY
CONSUMERS
SECONDARY CONSUMERS
PRIMARY CONSUMERS
PRODUCERS
If the sizes of the blocks in the diagram above indicate the number of organisms in each trophic level, which of the following
statements is true?
A.
There are fewer producers than there are primary consumers.
B. There are more secondary consumers than there are producers.
C. There are fewer tertiary consumers than there are secondary consumers.
D. There are more secondary consumers than there are primary consumers.

Which best describes the digestive system of arthropods? a incomplete, two openings b complete, one opening c two-way, one opening d one-way, two openings

6. in domesticated cats, the following are independently assorting: normal ears (t) is dominant to tufted ears (t); curved whiskers (c) is dominant to straight whiskers (c); the presence of six toes (s) is dominant to five toes (s); gene for hair length is an x-linked codominant. the three phenotypes for hair length are long (xhxh), medium (xhxh), and short (xhxh); medium is the heterozygous condition. given two parents: ttccssxhxh x ttccssxhy how many different gametes could be formed in the female cat with respect to these four traits? how many phenotypes are possible in the offspring from this mating?

Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.