Which statement about diversity in eye development is not correct?
A. Planaria have the simplest eyes, which are
basically pit-shaped cells containing
photoreceptors.
B. Evolution of the spherical lens improved
images as animals evolved.
C. Both squids and vertebrates have singlelens
eyes, but they are very different in their
development, anatomy, and physiology.
D. The percentage of living animals
possessing true eyes that can produce an
image is small.
E. Compound eyes consist of hundreds of
small lenses arranged on a convex surface.
D
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Which of the following statements are true about DNA replication in eukaryotes? Select all that apply.A) Replication of the entire genome takes about ten minutes.B) A replication fork occurs at each growing point of the replicating chromosome(s).C) Eukaryotes have many different chromosomes, with replication occurring in each at the same time.D) Replication occurs at the rate of about 500-5000 base pairs per minute.E) Multiple sites of replication are present on each chromosome.
What will be an ideal response?
Zara has worked for 40 years at a garden center, where she often potted plants. In the early days, she frequently worked with vermiculite, an asbestos-like material
Which organelles are most likely to have destabilized membranes as a result of exposure to vermiculite? A) nuclei B) mitochondria C) Golgi complexes D) lysosomes
Which prokaryote is described accurately?
A. A coccus is corkscrew shaped. B. An archaean is arch shaped. C. A bacillus is rod shaped. D. A spirillum is spherical. E. A coccus is flattened.
Which one of the following bacteria does NOT belong with the others?
A) Bacillus B) Escherichia C) Lactobacillus D) Staphylococcus E) Streptococcus