Chiasmata (or chiasma) provide evidence of
A) meiosis.
B) chromosomal aberration.
C) fertilization.
D) spindle fiber formation.
E) crossing over.
E
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The organ system that maintains a constant internal environment through the excretion of nitrogenous wastes.
A) Muscular
G) Respiratory
B) Reproductive
H) Skeletal
C) Digestive
I) Nervous
D) Cardiovascular
J) Endocrine
E) Integumentary
K) Lymphatic
F) Urinary
The chytrid Batrachochytrium dendrobatidis is responsible for a disease that ____
a. is sexually transmitted in humans b. has wiped out many species of frogs c. infects wheat, rye, and other grain crops d. is killing trees in temperate forests e. kills millions of humans each year
Organogenesis
A. Arises from germ layer cells. B. involves failure of the organs to form. C. is when tadpoles become frogs. D. is the formation of the three germ layers. E. involves acrosomal reaction.
A dihybrid individual is an individual that __________
a. Is heterozygous for two traits b. Is true breeding c. Is homozygous d. Has two different alleles for one trait