What is an advantage for using Arabidopsis to study plant development and genetics?
a. The Arabidopsis genome is largely unstudied, and therefore there is a lot that scientists can learn.
b. Arabidopsis mutants can be easily induced with chemicals.
c. There are no developmental mutants in Arabidopsis, therefore, normal development can be studied easily.
d. This plant completes its life cycle in just a few months.
e. This plant is a weed of no economic importance
b
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Phenylalanine is a(n) ____ and the starting point for a network of metabolic pathways
a. lactase precursor molecules b. carbohydrate by-products of respiration c. essential amino acid d. sub-types of hemoglobin e. phenylthiocarbamides
Which of the following structures are used by bacteria, fungi, and protozoans to adhere to their host?
a. lysosomes b. flagella c. actin skeleton d. fimbrae e. capsule f. spike g. surface proteins h. slime layer
Within a genus that normally produces large numbers of offspring, one particular species evolves maternal care behavior. What do you predict will happen to the survivorship curve?
A. No change is likely. B. It may change from type I to type II. C. It may change from type I to type III. D. It may change from type III to type I.
Transgenic animals
A. are often obtained from germline engineering. B. will pass the genes on to their offspring. C. can be engineered to become factories for manufacturing proteins. D. commonly include mice. E. All of the choices are correct.