What is a disadvantage of using fossils to reconstruct phylogenetic history?
A. Fossils are a physical record of organismal
structure.
B. Fossils yield information about the timing
and order of events in the past.
C. Fossils reveal relatedness.
D. The probability of fossilization varies
among species.
D
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In garden peas, one pair of alleles controls the height of the plant, and a second pair of alleles controls flower color
The allele for tall (D) is dominant to the allele for dwarf (d), and the allele for purple (P) is dominant to the allele for white (p). A tall plant with purple flowers crossed with a dwarf plant with white flowers produces 1/2 tall with purple flowers and 1/2 tall with white flowers. What is the genotype of the parents? What will be an ideal response?
All of the following are factors in enzyme-catalyzed
reactions that work alone or in combination to lower the activation energy EXCEPT a. helping substrates get together. b. orienting substrates in positions favoring reaction. c. using ATP as an energy source. d. shutting out water molecules. e. inducing a fit between enzyme and substrate.
DNA is associated with RNA and certain proteins forming chromatin
__________________Indicate whether the statement is true or false.
The hallucinogen LSD is a product of ________.
A. ascomycetes B. basidiomycetes C. yeasts D. zygomycetes