No population continues to grow in size indefinitely
Indicate whether the statement is true or false
TRUE
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The H substance is needed for the proper phenotypic expression of the A, B, and AB blood types in the ABO blood typing system in humans. Individuals who are recessive for the H substance (hh) will have a type O phenotype, even if they have the A and/or B alleles. Two individuals, each with type AB blood and heterozygous at the H locus have children. What is the probability they will have a child who is phenotypically type O?
A. No chance B. 100% C. 3/16 D. 4/16 E. 6/16
The structure labeled "A" is the ____
a. aorta b. inferior vena cava c. pulmonary artery d. pulmonary vein e. superior vena cava
Mitochondria are thought to have evolved from ancient bacteria. Which characteristics of a free-living bacteria have mitochondria lost over time?
A) an independent genome B) ribosomes C) phospholipid membranes D) motility E) ribosomes, phospholipid membranes, motility, and an independent genome
Variation among organisms is due to mutations
Indicate whether the statement is true or false