Which of the following statements about fish gills is true?
A) They have a large surface area.
B) Because of their efficiency, they only need a small surface area.
C) They have a poor blood supply.
D) Like lungs, they have an exhale/inhale function.
Answer: A
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Evolution at the genomic level involves changes in
A. chromosome structure and number. B. sequences of amino acids in proteins. C. sequences of nucleotides in RNA molecules. D. incorporation of new organelles such as the mitochondrion. E. DNA and histone relationships.
In a mature plant cell, ____ may occupy more than 90% of the cell's volume
a. the nucleus b. chromoplasts c. rough endoplasmic reticulum d. the central vacuole e. chloroplasts
When producing a karyotype, the pairs of chromosomes ____
a. are arranged largest to smallest b. are arranged in alphabetical order c. are arranged with the X and Y first d. are aligned horizontally by their centromeres e. are arranged randomly
Your thigh bone, the largest bone in your body, is called the ________
A) tibia B) femur C) fibula D) pelvis