Ferns produce their spores through meiosis.
Indicate whether the statement is true or false.
Answer: True.
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The dermis of mammalian skin, including that of humans, contains a large amount of extracellular matrix proteins, including collagen and elastin. As a person ages, the amount of elastin in the dermis declines
Which of the following cell types is likely to be the cause of this change in the dermis of the skin? A. keratinocytes B. fibroblasts C. melanocytes D. epidermal cells
You discover a fungus that makes both sexual and asexual spores. The sexual spores are made in
groups of eight within a structure that bursts open to release the spores. The structures containing sexual spores are found within a multicellular structure that is about five inches tall. Into which group should you classify this fungus?
a. Glomeromycota b. Basidiomycota c. Chytridiomycota d. Zygomycota e. Ascomycota
How are acrosomal proteins released?
a. The most soluble acrosomal proteins are released first; bound acrosomal proteins are released second d. Acrosomal proteins are released after the zona pellucida is penetrated b. Bound acrosomal proteins are released first; soluble acrosomal proteins are released second e. Sperm begin the acrosomal reaction after reaction with the zona pellucida c. Acrosomal proteins are released in one phase
Homeotic genes
a. cause lethal mutations. b. regulate development of specific body parts. c. are found only in fruit flies, where they are responsible for odd placement of appendages. d. produce "fate maps." e. form as blocks of genes in cells randomly distributed throughout the body