Lampreys and sharks both have _____
a. jaws d. a swim bladder
b. a bony skeleton e. a four-chambered heart
c. a cranium f. lungs
C
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In pines, the mature male gametophyte is called the ____
a. flagellated sperm b. pollen cone c. pollen tube d. pollen grain e. pollination drop
Why do triglycerides yield more energy than carbohydrates?
a. they have fewer removable electrons b. they have double bonds c. they contain glycerol d. they have more removable electrons e. fatty acids
Plants are susceptible to bacterial infections, which can damage their structure or even kill them. Which of the following would be the best antibiotic to treat a plant that is infected with bacteria?
A) a drug that interferes with mitochondria function B) a drug that disrupts cell wall structure and function C) a drug that destroys the central vacuole D) a drug that blocks gene expression in circular chromosomes
Choose the solution with the lowest water concentration.
a. Glucose 20 mM, urea 30 mM, NaCl 150 mM, CaCl2 10 mM b. Glucose 10 mM, urea 100 mM, NaCl 10 mM, CaCl2 50 mM c. Glucose 100 mM, urea 200 mM, NaCl 20 mM, CaCl2 20 mM d. Glucose 30 mM, urea 10 mM, NaCl 60 mM, CaCl2 100 mM