Which type of lifestyle is demonstrated by bacteria in biofilms?
A. Sessile
B. Photoautotrophic
C. Planktonic
D. Parasitic
Answer: A
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In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by _____
A) hydrogen bonds B) nonpolar covalent bonds C) polar covalent bonds D) ionic bonds
Which of the following is not a characteristic of fungi?
a. all are eukaryotic b. all break down food internally c. most are multi-celled d. some form mushroom fruiting bodies e. some are single celled
At the end of the contractile period, energy from the breakdown of ATP is used to
A) transport calcium back into the sarcoplasmic reticulum. B) repair any muscle damaged during contraction. C) digest energy sources to generate new ATP for the next round of contractions. D) produce lactic acid. E) unlink the troponin-tropomyosin complexes.
Sapwood develops from __________
a. secondary xylem b. secondary phloem c. primary phloem d. primary xylem e. cork parenchyma