In fruit flies (Drosophila), an embryo during gastrulation:
A. begins enclosing nuclei within their own
cell membranes.
B. forms its three germ layers.
C. becomes organized into distinct segments.
D. forms three germ layers and becomes
organized into distinct segments.
E. begins enclosing nuclei within their own
cell membranes, forms three germ layers,
and becomes organized into distinct
segments.
D
You might also like to view...
Virions infecting some bacteria possess the enzyme ________ that makes a small hole in the bacterial cell wall, allowing the viral nucleic acid to enter
A) peptidoglycanase B) infectase C) lysozyme D) nuclease
Each unique combination of nucleotides on a Y chromosome constitutes a Y-chromosome:
A. mutation. B. mutation sequence. C. haploid mutation. D. haploid genotype. E. haploid sequence.
What is currently a main contaminate of beaches?
a. Legally dumped wastes b. Release of raw sewage c. Overflowing storm drains d. None of these choices
Bacteria in our mouths feed off the sugars in foods that we eat. As these bacteria ferment the sugars, they generate a product that can cause dental cavities. What is this product?
A) Lactic acid B) Citric acid C) Acetyl CoA D) Hydrochloric acid E) Pyruvate