The situation in which some offspring are haploid and others diploid is referred to as
A. dihaploidy.
B. viviparity.
C. eusociality.
D. haplodiploidy.
E. didiploidy.
Answer: D
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Which of the following events probably made the evolution of cellular respiration possible?
a. Accumulation of carbon dioxide in atmosphere d. Emergence of eukaryotes b. Emergence of prokaryotes e. Emergence of plants c. Accumulation of oxygen in atmosphere
Viroids
a. are more complex than viruses b. have large DNA genomes c. encode their own polymerase for nucleic acid replication d. cause diseases in plants e. infect animal cells
Why do veins have less elastic components than arteries?
What will be an ideal response?
Progymnosperms had two derived features:a
microphylls and herbaceous tissue. b. microphylls and woody tissue. c. megaphylls and herbaceous tissue. d. megaphylls and woody tissue. e. both megaphylls and microphylls and herbaceous tissue.