If you wanted to propagate (grow) ferns, what do you need to collect from existing ferns?
A) diploid zygote cells
B) haploid spores
C) fossil fuels
D) seeds
B
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The function of pits in the walls of tracheids is
A. allowing the passage of water.B. stopping backflow of water. C. secretion of resin. D. sealing off air bubbles. E. allowing the escape of air.
Linkage between a gene of interest and a DNA marker is being studied. A mating results in 6 parental and 3 recombinant offspring. What additional data would increase your confidence that the gene of interest and the DNA marker are linked? (Select all that apply.)
A) Analysis of another mating from the same pedigree that produced 4 parental and 4 recombinant offspring. B) Analysis of a mating from a different pedigree that produced 4 parental and 4 recombinant offspring. C) Analysis of a mating from a different pedigree that produced 6 parental and 2 recombinant offspring. D) Analysis of another mating from the same pedigree that produced 6 parental and 2 recombinant offspring.
Which organ system delivers nutrients and
oxygen to the cells?
a. respiratory b. urinary c. digestive d. lymphatic e. circulatory
What is the Allee effect?
A. when fitness increases independently of population size B. when fitness and growth rates increase with increasing population size C. when growth rates increase independently of population size D. when fitness and growth rates increase with decreasing population size