The first reptiles were the sail-back
A. dinosaurs.
B. therapsids.
C. pelycosaurs.
D. thecodonts.
Answer: C
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Sexual reproduction
A. allows more offspring to be produced per individual. B. allows a parent to pass on 100% of their genes to offspring. C. increases genetic variation. D. results in the formation of a haploid zygote. E. only occurs in vertebrates.
Through a sequence similarity search, a researcher identifies a gene whose predicted protein product has a putative
function of a photosynthesis-enhancing enzyme. Which experimental method could be performed to verify this function?
a. PCR b. an assay measuring photosynthetic productivity c. identification of signature genes d. DNA microarray e. gene knockout
What tissue type protects the body from water loss?
What will be an ideal response?
Leaflets are part of a more complex leaf called a(n) ________ leaf.
Fill in the blank(s) with the appropriate word(s).