Cells are involved in the process called ____________ immunity. Activated B cells become ____________ cells which produce ____________ . T cells are involved in the ____________ immune response, directly interacting with their target cells.
Fill in the blank(s) with the appropriate word(s).
Ans: Humoral; Plasma; Antibodies; Cellular
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Which of the following statements about predation are true? Check all that apply.
_____ Cycling of predator and prey populations is not commonly observed. _____ Removal of a predator often leads to increased community stability. _____ Animal predation on plants is called herbivory. _____ Predation can induce coevolutionary changes in prey species. _____ Batesian mimicry is not a coevolutionary adaptation to predation.
What phenomenon results from the runoff of fertilizers from agricultural and residential areas causing the aquatic algae in bodies of water to grow prolifically?
A) competitive exclusion B) habitat fragmentation C) eutrophication D) overexploitation
Humans have ________ different types of autosomes.
A. 22 B. 44 C. 11 D. 23 E. 46
A double-stranded DNA molecule can be separated into single strands by heating it to 90°C because _______________________
(a) heat disrupts the hydrogen bonds holding the sugar–phosphate backbone together. (b) DNA is negatively charged. (c) heat disrupts hydrogen-bonding between complementary nucleotides. (d) DNA is positively charged.