Which of the following statements is false?
a. Shark’s teeth are modified scales that are
continuously shed and replaced.
b. Many fish use a swim bladder to provide
buoyancy control.
c. The bony fishes were the ancestors of the
cartilaginous fishes.
d. The ray-finned fishes are the most numerous and
diverse of the fish groups.
e. The lobe-finned fishes are represented today
only by the coelacanths.
Answer: c
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A controlled experiment is one that _____
A) proceeds slowly enough that a scientist can make careful records of the results B) tests experimental and control groups in parallel C) is repeated many times to make sure the results are accurate D) controls all variables E) is supervised by an experienced scientist
What is a reason that the proteome is larger than the genome?
A. Alternative splicing B. Proteins are constantly being synthesized and degraded. C. Each protein has a specific function which are quite varied while the genes in the genome are only transcribed D. Each protein has multiple functional domains whille each gene consists of three basic parts.
The ____ prevents important substances in the xylem form leaking into the root cortex
a. primary xylem b. root hairs c. endodermis d. tonoplasts e. pericycle
Some evidence that algae are the closest relatives to plants is that they both
A. have chloroplasts. B. contain chlorophyll a. C. have cellulose-rich cell walls. D. use starch as a nutrient reserve. E. All of the answer choices are correct.