Decapod crustaceans (shrimps, lobsters, and crabs) all lack  

A.  a carapace, a dorsal cephalothorax shield.
B.  a ventral line of appendages, swimmerets.
C.  a tail spine, telson.
D.  chelicerae.


D.  chelicerae.

Biology & Microbiology

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Given that these two gene loci are very closely linked, the phenotypic ratio in the F2 generation should be closest to  

A.  1 brown eye, heavy wing veins: 2 red eye, thin wing veins: 1 brown eye, thin wing veins B.  1 brown eye, thin wing veins: 2 red eye, thin wing veins: 1 red eye, heavy wing veins C.  3 red eye, thin wing veins: 1 brown eye, heavy wing veins D.  1 brown eye: 1 red eye: 1 heavy wing veins: 1 thin wing veins Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain?   Gather Content · What do you already know about genetic linkage?   Consider Possibilities · Consider the different answer options. Which can you rule out?   Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?   Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?  

Biology & Microbiology

During which developmental stage is the human body plan set and organ formation occurs?

a. zygote b. blastocyst c. embryo d. fetus e. infant

Biology & Microbiology

Most humans need about ________ kcal per day

A) 500-700 B) 1,300-1,800 C) 2,500-3,000 D) 20,000-30,000

Biology & Microbiology

Which two drugs are in the same category?

A. cocaine and marijuana B. alcohol and heroin C. nicotine and alcohol D. nicotine and heroin E. marijuana and heroin

Biology & Microbiology