After making careful observations, scientist construct a(n)
A. scientific method
B. hypothesis
C. cohort
D. research question
Answer: B. hypothesis
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Component of cell walls, involved in maintenance of membrane structure.
Choose the letter of the best match: A. nitrogen B. calcium C. potassium D. phosphorus E. magnesium
Which accessory digestive organ produces bile?
a. pancreas b. gallbladder c. liver d. duodenum e. stomach
What is the term used to describe relatively small areas with unusually high concentrations of species found there and nowhere else, including many species in high risk of extinction? These areas receive the focus of global conservation efforts
A) Natural wildlife reserve B) Biodiversity hot spot C) Protective wilderness refuge D) Protective conservation zone
Why would gene duplication events, such as those seen in the Hox gene complex, set the stage for adaptive radiation?
A) There are more copies of genes, meaning speciation had occurred by polyploidy. B) The original gene copy is the outgroup, and the new gene copies are the adaptive radiation. C) Without duplicated genes, species would be vulnerable to extinction. D) One copy of a gene can perform the original function, while other copies are available to take on new functions.