Which of the following is incorrectly paired?
a. tendons—link muscles to bones
b. ligaments—hold bones in place
c. muscle fibers—make up a myofibril
d. cartilage—functions as a shock absorber
C
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Why is the developmental sequence relatively similar across the animal kingdom?
a. Because most animals reproduce sexually b. Because most animals exhibit bilateral symmetry c. Because most animals have an internal body cavity d. Because most animals are considered coelomates
What is a cloaca?
a. a body opening that serves solely as the exit for wastes from a digestive tract b. a multi-chambered stomach c. a saclike gut that also functions in gas exchange d. a chamber lined with hard protein particles for breaking up tough foods e. a multipurpose body opening that serves as an exit for digestive and urinary tract and also functions in reproduction
The opening to the tracheal system (respiratory system) in insects is the
A. spiracle. B. trachea. C. bronchus. D. alveolus. E. stomata.
A hypothetical population has two alleles for a gene: A and a. In a random sample of 100 individuals, 20 are homozygous for a, 20 are homozygous for A, and 60 are heterozygous. What is the frequency of A?
A) 20% B) 25% C) 50% D) 60% E) 80%