In snapdragons, heterozygotes have pink flowers, whereas homozygotes have red or white flowers. When plants with red flowers are crossed with plants with white flowers, what proportion of the offspring will have pink flowers?
A) 0%
B) 25%
C) 50%
D) 75%
E) 100%
Answer: E) 100%
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Which of the following is NOT a bias that could be encountered when investigating the role of
competition in a community?
a. More studies are published when competition is a factor. b. More studies in K-selected species than in r-selected species. c. The importance of competition may be overestimated. d. The importance of competition may be underestimated. e. The assumption that evolution never occurs.
Which mineral is essential to the production of thyroid hormone?
a. iron b. calcium c. sodium d. potassium e. iodine
A scientist wants to manipulate glucose levels in amphibians to determine freeze tolerance at -5 Celsius. Which arena would suit this question best?
A) Laboratory experiment B) Field experiment C) Field surveys D) Observation in the wild
How are cancer cells different from normal cells?
What will be an ideal response?