In the case of comparing birds to other vertebrates, having four appendages is
a. a shared ancestral character.
b. a shared derived character.
c. a character useful for distinguishing the birds from other vertebrates.
d. an example of analogy rather than homology.
Answer: a. a shared ancestral character.
You might also like to view...
A testcross consists of a cross
a. of two pure-breeding forms to find out which form of a gene is dominant. b. between two unknown forms to determine their genotypes. c. between an offspring and its homozygous dominant parent. d. of an organism of dominant phenotype but unknown genotype to an individual that is homozygous recessive for that trait. e. of two F2 individuals to produce an F3 generation.
Which of the following is classified as a trace element in the human diet?
a. potassium b. iron c. sulfur d. magnesium e. sodium
When your mother is mad at you, she likes to remind you that she spent 48 hours in painful labor to bring you into the world! Specifically, she means that she spent a long time in the ________ stage of labor
A) expulsion B) dilation C) third trimester D) placental
For a person who has any type of chromosomal abnormality, what factor(s) has/have the greatest impact on both physical and cognitive potential?
A. Prenatal testing and diagnosis B. The number of affected family members C. Personal family environment and social interaction D. The number of chromosomes involved with the abnormality