After following populations of E. coli for 1150 generations, Sandra Trindale and her colleagues noted that most mutations are _______
Fill in the blank with the appropriate word.
deleterious
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Sympatric speciation differs from allopatric speciation because with sympatric speciation
A. a population becomes geographically isolated. B. two populations of the same species merge to form a single population. C. polyploidy (changes in the number of sets of chromosomes) arises. D. hybrid zones form. E. temporal factors may arise without geographic isolation occurring and polyploidy may arise.
Which body region is composed of cartilage?
a. nose b. outer ear c. windpipe d. embryonic skeleton e. all of these
A key innovation that helped sporophyte dominant plants survive in high, dry environments is ____
a. flagellated sperm b. the cuticle c. xylem d. phloem e. lignin
The ovaries of women function as endocrine organs by producing
A) estrogen and progesterone. B) oxytocin. C) growth hormone. D) ADH. E) prostaglandins.