Which of the following is among the results of nondisjunction?
a. a change in the status of a daughter cell from diploid to haploid
b. a failure of spindle fibres to separate a homologous pair of chromosomes
c. one pole receiving neither member of a homologous pair of chromosomes
d. a change in the status of a daughter cell from haploid to diploid
Ans: c. one pole receiving neither member of a homologous pair of chromosomes
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labeled “D” in the figure? a. They are haploid. b. They will germinate to produce mycelia of different mating strains. c. They may fuse to produce a zygote. d. They result from sexual reproduction. e. They are spores.
Nervous tissue is composed of neurons and ____________________, which support and nourish neurons. Fill in the blank(s) with the appropriate word(s)
Vessel elements differ from tracheids differ in that vessel elements contain pits
____________________ Indicate whether the statement is true or false.
What does RNA polymerase bind to in order to initiate transcription?
A) DNA promoter region B) RNA promoter region C) start codon D) mRNA