Which of the following is a true statement?
A. A cross between Bb and bb genotypes would lead to offspring with a 1:4 phenotypic ratio.
B. An example of a homozygous individual is Bb.
C. You may associate pedigrees with purebred animals, such as purebred dogs, but pedigrees cannot represent human matings.
D. A testcross is a mating between an individual with a dominant phenotype (but unknown genotype) and a homozygous recessive individual.
D. A testcross is a mating between an individual with a dominant phenotype (but unknown genotype) and a homozygous recessive individual.
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When two different species require the same resources we may observe
a. intraspecific competition. b. resource partitioning. c. interspecific competition. d. predation. e. symbiosis/parasitism.
It is estimated that ____ tons of plastic enter the ocean annually
a. 500 b. 500 thousand c. 1 million d. 10 million e. 100 million
For roundworms living in the intestine of a
vertebrate, the cuticle most probably serves in what capacity? a. water retention b. nutrient absorption c. protection from digestive enzymes d. excretion of metabolic wastes e. sensory detection
Would you expect desert plants to have a thin or thick cuticle?
A) thin because desert plants do not have stomata B) thin because desert plants have a short root system C) thick because desert plants have an extensive shoot system D) thick because desert plants need to retain water in this dry environment