Thalassemia is a very serious disorder that affects hemoglobin. It is caused by an autosomal recessive gene. If both a woman and a man are carriers, then what is the chance that they will have a child with the disease?
A) 75% B) 100% C) 50% D) 25%
Answer: D
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These birds resemble each other, but live in vastly different geographic areas. What is their evolutionary relationship?
1.They cannot be related if they lived on different continents.
2.They are vestigial forms of one another.
3.They resemble each other outwardly but are very different internally.
4.They all had a common ancestor.
Histoplasma capsulatum
A) is an opportunistic fungus. B) produces arthrospores. C) produces capsules. D) produces yeast cells with a "steering wheel" formation. E) is an intracellular parasite.
The anthropoids of the Oligocene lived in
a. hot, dry deserts. b. grassy savannas. c. tropical rainforests. d. the watery swamps. e. cool and pleasant mountains.
Cladograms will group birds with reptiles because these groups share
A. many similar characteristics. B. derived characteristics. C. a common ancestor. D. All of the options are correct.