The four phyla of the gymnosperms are
A. conifers, monocotyledons, dicotyledons, and cycads.
B. monocotyledons, dicotyledons, conifers, and cycads.
C. conifers, cycads, ginkgos, and gnetophytes.
D. horsetails, true ferns, whisk ferns, and club mosses.
E. mosses, liverworts, club mosses, and hornworts.
C. conifers, cycads, ginkgos, and gnetophytes.
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The membranes of winter wheat are able to remain fluid when it is extremely cold by _____
A) increasing the percentage of unsaturated phospholipids in the membrane B) increasing the percentage of cholesterol molecules in the membrane C) decreasing the number of hydrophobic proteins in the membrane D) cotransport of glucose and hydrogen E) using active transport
The function of a repressor protein is to ________
a. begin translation b. begin transcription c. prevent translation d. prevent transcription
Density-independent factors that limit population growth include ____.
A. parasites B. temperature C. disease D. competition E. predation
Which of the following foods would be least likely to contribute to the development of heart disease?
A) margarine B) butter C) bacon D) fish oil