The site of formation of pollen grains is in the

A) carpel.
B) sepal.
C) receptacle.
D) petal.
E) stamen.

(1) Alveolar pressure during inspiration
(2) Alveolar pressure during expiration

A) First item is greater than the second item.
B) First item is less than the second item.
C) First item is equal or nearly equal to the second item.

Membrane potential cannot exceed +30 mV because at this level, voltage-gated sodium channels close, and ____.

A) potassium moves across the cell membrane via passive transport proteins
B) sodium moves across the cell membrane via passive transport proteins
C) potassium gated channels open
D) potassium flows into the cytoplasm
E) the action potential is not propagated

Which organism has a three-chambered heart?

A) human
B) amphibian
C) arthropod
D) bird
E) fish

messenger RNA

A) sites at which RNA polymerases can bind and initiate transcription
B) encodes the gene's protein building information for translation
C) process which is guided and catalyzed by RNA polymerases
D) a tRNA triplet that binds to mRNA
E) a set of three nucleotides that codes for an amino acid
F) process which includes the formation of peptide bonds between amino acids

How many points of origin does the triceps brachii have?

A) four
B) one
C) three
D) two

When individuals experience fear and pleasure, what part of the brain has been stimulated?

A) hypothalamus
B) pons
C) reticular activating system
D) limbic system
E) thalamus

Polyphenic traits are an example of

A) phenotypic plasticity.
B) quantitative trait loci.
C) simple genetic polymorphism.
D) dominant traits.