Which of the following is an atomic particle that has no electrical charge?
A) electron
B) neutron
C) element
D) proton
E) isotope
B
Bloom's Taxonomy: Knowledge
Section: Atoms
Learning Outcome: 2.2
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Why do plants use cotransporters instead of ion channels to transfer anions into cells?
A) Cotransporters are able to transfer anions against the membrane potential gradient, but ion channels cannot. B) Cotransporters can transfer ions across cell membranes, but ion channels cannot transport ions across cell membranes. C) Cotransporters are able to transfer anions against the proton gradient, but ion channels cannot. D) Anions are too bulky to be transported by ion channels.
Four of the five answers listed below are
related. Select the EXCEPTION.
a. jellyfish b. hydra c. tunicates d. corals e. sea anemones
Congenital deafness in humans is due to the homozygous condition of either of the recessive alleles d or e, or both
Both dominant D and E are necessary for normal hearing. Gene D/d affects the middle ear, while gene E/e affects the inner ear. It does not matter how good the normal inner ear (as indicated by E__) is; if there is something wrong in the middle ear, the individual is unable to hear. The same applies for the other gene. Give the phenotypic results of the following crosses: (a) Dd EE x Dd EE (b) Dd Ee x Dd Ee (c) dd EE x DD ee (d) Dd EE x Dd ee (e) Dd EE x DD Ee What will be an ideal response?
The number of births per female of age x is referred to as the
A) crude birthrate. B) age-specific birthrate. C) gross reproductive rate. D) net reproductive rate.