Explain the four features necessary to classify an organism as a vertebrate.
What will be an ideal response?
The answer should include:
1. Presence of a vertebral column
2. Skull that encloses and protects the brain
3. Cartilaginous or bony endoskeleton
4. Large coelom and complete digestive tract
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The epiglottis functions during
A) yellowing B) speaking C) breathing D) swallowing
A population's age structure tracks ____
a. the average age of the members of the population b. how long the population has existed in the area c. the rate at which the population is aging d. the relative numbers of each age e. death rate
The closest relatives of the familiar pine and spruce trees are _____
A) ferns, horsetails, lycophytes, and club mosses B) hornworts, liverworts, and mosses C) gnetophytes, cycads, and ginkgos D) elms, maples, and aspens
Which functional group is incorrectly matched with its structure?
A) ether: R-CH3 B) amino: R-NH2 C) phosphate: R-PO42- D) carboxyl: R-COOH E) alcohol: R-OH