The main difference between protonephridia and metanephridia is that:a
protonephridia are involved in osmoregulation, while metanephridia are involved in excretion.
b. protonephridia consist of blind flame cells, while metanephridia consist of tubules open at both ends.
c. protonephridia are involved in excretion, while metanephridia are involved in osmoregulation.
d. protonephridia consist of tubules open at both ends, while metanephridia consist of blind flame cells.
e. protonephridia are found in annelids and metanephridia are found in flatworms
b
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Which of the following organelles does not receive proteins synthesized on cytoplasmic ribosomes by posttranslational import?
A) lysosome B) nucleus C) mitochondria D) peroxisomes E) chloroplast
Assume that in guinea pigs, dark brown fur (B) is dominant to black fur (b). If you mate a black guinea pig with a homozygous brown guinea pig, what proportion of the progeny will be homozygous?
A) none B) 1/4 C) 1/2 D) 3/4 E) all
Which of the following mechanisms increases genetic diversity?
a. crossing-over between chromosomes during meiosis b. independent assortment of chromosomes during meiosis c. random DNA mutations d. crossing-over between chromosomes and independent assortment of chromosomes during meiosis e. crossing-over between chromosomes, independent assortment of chromosomes during meiosis, and random DNA mutations
The domain Eukarya has ________ kingdoms
Fill in the blank(s) with correct word