Which of the following statements is false?
a. Ferns produce seeds inside sori.
b. Bryophytes do not have xylem or phloem.
c. Gymnosperms and angiosperms produce seeds.
d. Only angiosperms produce flowers.
A
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In a newly fertilized egg, the vitelline layer _____
A) opens the egg's nuclear membrane to allow haploid sperm DNA to enter B) lifts away from the egg and hardens to form a fertilization envelope C) secretes hormones that enhance steroidogenesis by the ovary D) reduces the loss of water from the egg and prevents desiccation E) provides most of the nutrients used by the zygote
Chemicals called un-couplers can make membranes permeable to small molecules and ions. What effect might un-couplers have on photosynthesis?
A. Increased ATP production because cyclic electron transport would increase B. Decreased ATP production because the proton-gradient would increase C. Decreased ATP production because the proton-gradient would decrease D. Decreased NADPH production because the proton-gradient would increase E. Decreased NADPH production because the proton-gradient would decrease
What is the name of the birth defect in which the neural tube fails to close completely?
a. neurulation b. fossa ovalis c. organogenesis d. spina bifida e. capacitation
A bryophyte having a single large hloroplast in each cell belongs to the phylum:a
Hepatophyta. b. Pterophyta. c. Lycopodiophyta. d. Anthocerophyta. e. Bryophyta.