Unlike angiosperms, gymnosperms like pines have single instead of double fertilization, but otherwise have an identical life cycle. What structure should have the greatest difference between angiosperms and gymnosperms?
A) egg cell
B) seedling
C) seed
D) leaf cell
C
You might also like to view...
If fertilization involves two gametes that contain different alleles of a given gene, the resulting offspring is
A. dihybrid. B. haploid. C. heterozygous. D. homozygous. E. polygenic.
The _____ forms of the electron carriers NAD+/NADH and FADH/FADH2 have high potential energy
A. oxidized B. reduced C. phosphorylated D. carboxylated E. None of the answer options is correct.
Which of the following best describes the tRNA binding sites of the ribosome?
A. Only one of the three sites can be occupied by a tRNA molecule at any given time. B. Each tRNA that associates with the ribosome must first bind in the P site and then move to the A site. C. The P site contains the tRNA molecule covalently bound to the growing chain of amino acids. D. All tRNAs leave the ribosome through the A site.
During what period did one of the greatest extinctions of mammals occur?
A) Cretaceous B) Permian C) Pleistocene D) Carboniferous