The results of the Lenski and Travisano experiment on cells in 12 replicate lines of E. coli illustrate the fact that:

a. evolution by natural selection is sometimes significantly affected by chance events such as random mutations and the order in which they happen.
b. evolution by natural selection is often a predictable, repeatable process.
c. A and B.
d. Neither of the above.


C

Biology & Microbiology

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Choose the true statements about the role of genome analysis in crop improvement. Check all that apply. 

_____ Conservation of synteny will hinder our ability to find agriculturally important genes in plants. _____ Arabidopsis is being genetically modified as a crop plant. _____ Sequencing of the rice genome was important because it is related to many other cereal crop plants. _____ Insertion of genes from beneficial microbes into plant genomes can be used to improve crop yields.

Biology & Microbiology

The rate at which an animal consumes energy at rest is called _______.  

A.  glycogenolysis B.  gluconeogenesis C.  the basal metabolic rate D.  rumination E.  fermentation

Biology & Microbiology

The hierarchy of endocrine glands that control the release of sex steroid hormones is ____

a. hypothalamus, posterior pituitary, gonads b. hypothalamus, anterior pituitary, gonads c. anterior pituitary, hypothalamus, gonads d. posterior pituitary, hypothalamus, gonads e. anterior pituitary, posterior pituitary, gonads

Biology & Microbiology

The substance that is secreted by a bacterial pathogen is known as ___________.

A. exotoxin B. siderophores C. endotoxin D. chlamydia E. Coxiella

Biology & Microbiology