Some current research efforts are investigating whether or not ________, a group of prokaryotes with the ability to produce oxygen as a by-product of photosynthesis, can be used as a source of renewable energy by converting sunlight into electricity
A) chlamydias
B) spirochetes
C) proteobacteria
D) cyanobacteria
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During DNA cloning, why is the DNA of interest inserted into the middle of the lacZ+ coding sequence in the plasmid
vector?
a. It makes the bacteria resistant to the antibiotic. b. It allows researchers to distinguish bacteria that contain the plasmid from those that do not. c. It aids scientists in developing new antibiotic treatments. d. It allows researchers to distinguish bacteria that contain the recombinant plasmid from those that contain just the vector. e. It makes the bacteria produce more clones.
The female reproductive whorl of a flower typically consists of one or more ____
a. petals b. carpels c. stamens d. receptacles e. sepals
Increases in melanocyte-stimulating hormone (MSH) could result in increased pigmentation
Indicate whether the statement is true or false.
Answer the following statements true (T) or false (F)
1.The tendency to concentrate sensory organs and brain at the head end of an animal is called cephalization. 2.Centipedes, earthworms, and roundworms all illustrate segmentation. 3.An animal with an indirect development undergoes a metamorphosis in which larvae do not resemble the adult. 4.Flatworms have complete digestive tracts. 5.Flatworms have bilateral symmetry.