Pollination occurs when the pollen of a flower lands on which plant structure?
What will be an ideal response?
stigma
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The sugar phosphate backbone of the DNA stores genetic information
Indicate whether the statement is true or false
An island is on the migration route of sea birds. This island also has abundant tree-nesting birds that live on the island permanently and are not found on any other island. The two bird species do not interbreed. The tree-nesting birds are more likely than the sea birds to be in Hardy-Weinberg equilibrium because:
A. natural selection is stronger in the tree-nesting birds. B. there are fewer mutations in the sea birds. C. of high immigration and emigration in the sea bird population. D. the sea bird population is larger. E. mating is random in the tree-nesting birds.
A child may be given the vaccine for chickenpox. If the child goes to school and plays with other children who have the chickenpox virus, the vaccinated child will not get sick. Why is this?
A) Vaccines introduce a friendly virus into cells so they cannot be infected with a second virus. B) Vaccines stimulate macrophages to work extra hard to fight infections. C) Vaccines produce a primary response in which memory cells are generated that respond rapidly in a second exposure. D) Vaccines act like antibiotics so that any organism in the body will be destroyed before the immune system has to respond.
Cocci which divide in the same plane and remain attached are streptococci.
Answer the following statement true (T) or false (F)