In the life cycles of mosses and ferns, which of the following structures are diploid (2n)? Select all correct choices
A. sporophyte
B. gametophyte
C. zygote
D. sperm
E. eggs
A,C
Biology & Microbiology
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In Glacier Bay, one of the first species to colonize a newly exposed area of glacial till is fireweed. You would predict that fireweed is a(n) _____-selected species
A. r B. K
Biology & Microbiology
Soil formed by water seeping into rock crevices, freezing, and expanding is an example of chemical weathering
Indicate whether the statement is true or false
Biology & Microbiology
Which group of gymnosperms resembling small palms produce pollen and gametophytes on separate male and female plants, are usually pollinated by beetles?
A. Ginkgos B. Gnetophytes C. Ferns D. Cycads E. Ephedras
Biology & Microbiology
Which of these is the portion of the heartbeat that involves contraction of the heart?
A) pacemaker B) systole C) diastole D) cardiac cycle
Biology & Microbiology