Fossilized remains of humans and their immediate ancestors are found:a
only in rock formed from volcanoes.
b. only in relatively young rock.
c. in any rock from areas inhabited by humans.
d. only in rock from the Precambrian times.
e. only in relatively old rock
B
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What will be an ideal response?
In Drosophila, there is an autosomal gene that helps control the normal embryological development of larval flies. The normal allele is "bcd+" and the mutated version which creates an embryo with an abnormal body plan called bicoid is "bcd". If a mother possesses just one copy of the bcd+ gene, her offspring will develop normally regardless of the offsprings' genotype. Two flies who are both heterozygous for this gene are mated. What would be the expected phenotype(s) of their offspring in terms of development?
a) 3/4 of the offspring will have the normal body plan and 1/4 will be biocid. b) All of the offspring will develop the normal body plan. c) All of the offspring will be bicoid. d) 3/4 of the offspring will be bicoid and 1/4 will have the normal body plan.
Which statement is false about complex IV?
A) A binuclear center that contains an iron ion and heme-a3 is the site of the reduction of molecular oxygen to water. B) Bacterial and eukaryotic forms of complex IV have very similar structures and number of subunits per functional unit. C) The core structure of the cytochrome c oxidase in complex IV has three conserved subunits. D) Copper ions shift from a +2 oxidation state to a +1 oxidation state as electrons are passed through the complex.
What cyanobacterium has a phycoerythrin, no flagella and its cell surface must generate thrust by oscillating (like a traveling wave)?
a. Anabena b. Microcysts c. Chlorobi d. Spirulina e. Synechococcus