Stramenopiles are unique in that they possess:
A. double plastids
B. hairy flagella
C. alveoli
D. flexible protein ribbons beneath the plasma membrane
E. calcium carbonate crystals
B. hairy flagella
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The nectar that bumblebees feed on is an example of a(n) __________
a. carbohydrate b. protein c. amino acid d. peptide
The earth spins
a. fastest at 60 degrees latitude. b. fastest at the equator. c. fastest at 90 degrees latitude. d. fastest at 30 degrees latitude. e. at an equal speed at all points.
Both eyes have an optic disk. When an image is focused on the optic disk, it cannot be "seen."
Indicate whether the statement is true or false
In birds, sex is determined by a ZW chromosome scheme. Males are ZZ and females are ZW. A lethal recessive allele that causes death of the embryo is sometimes present on the Z chromosome in pigeons. What would be the sex ratio in the offspring of a cross between a male that is heterozygous for the lethal allele and a normal female?
A) 2:1 male to female B) 1:2 male to female C) 1:1 male to female D) 4:3 male to female E) 3:1 male to female