Which term refers to a cell cluster that contains both algal and hyphal cells and is used for asexual reproduction in lichens?
a. a haustorium
b. a soredium
c. an arbuscule
d. a thallus
Ans: b. a soredium
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Streptomycetes are gram-positive bacteria that are capable of producing antibiotic-like compounds, which were the basis for widely used antibiotics such as erythromycin
A. true B. false
In 1665, ________ used a microscope that he had built to examine thin slices of ________. While examining this material, he observed tiny compartments that he called cellulae.
A) Theodor Schwann; animal tissue B) Robert Hooke; cork C) Antonie van Leeuwenhoek; sperm cells D) Robert Brown; plant material E) Rudolf Virchow; collagen
Once amino acids are hydrolyzed from proteins, the energy can be harvested in cellular respiration pathways
A. as an intermediate molecule within the Krebs cycle. B. after slight modification to become acetyl CoA. C. after the ammonia group is removed. D. as in all of these answer options, with only minimal modification required. E. after slight modification to become pyruvate.
Which of the following is false about earthworms?
a. They are the first group to have a rudimentary brain. b. They are scavengers, living on detritus. c. They have a closed circulatory system with multiple hearts. d. Each segment has muscles, blood vessels, and nerves. e. Paired nephridia cleanse the coelomic fluid and discharge wastes.