Which body region is protected by fatty acids, acidic pH, lactic acid, and a tough cell barrier with its own normal flora?
A. skin
B. eyes
C. respiratory tract
D. urinary tract
E. digestive tract
Answer: A
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A haplotype is a group of tightly linked SNPs or genetic markers, and a haplogroup is a collection of haplotypes that came from a common ancestor.
Answer the following statement(s) true (T) or false (F)
If one of the parents in a dihybrid cross possesses the PpTt alleles, which allele combination is not possible in their gametes?
a. PT b. Pp c. Pt d. pT e. pt
Which is a defining characteristic of adaptive immunity?
a. nonspecificity b. diversity c. short-lived responses d. self recognition e. reliance on surface barriers
Suppose you are a botanist and you discover a plant that has a dominant gametophyte, but no xylem or phloem. Into which group should you classify this plant?
a. angiosperms b. gymnosperms c. seedless vascular plants d. bryophytes