During inhalation, the diaphragm moves upward
____________________ Indicate whether the statement is true or false.
F, downward
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True or False: To allow passage of the infant during child birth, the cervix widens and lengthens
A. true B. false
The world human population has increased dramatically during the past few centuries due to:
a. increased immigration. b. increased emigration. c. decreased death rates. d. increased birth rates. e. decreased birth rate
Macromolecules that are used by all organisms to store hereditary information are called:
A. ribosomal RNA molecules. B. transfer RNA molecules. C. messenger RNA molecules. D. DNA molecules. E. proteins.
In pea plants, a gene R produces red flowers and is dominant to a gene r, which produces white flowers. A gene T produces tall plants and is dominant to a gene t for short plants. If a plant that is homozygous for red flowers and heterozygous for tallness is crossed with a plant that is short and white, what will be the phenotypic ratio of the offspring?
A. one tall red:one short red B. nine tall red:three short red:three tall white:one short white C. three tall red:one short red:one tall white D. one short white:two short red:one tall white