Amongst the chordates, which features are unique to the tunicates?

A. sexual reproduction and complete digestive system
B. leathery outer covering and sessile adult stage
C. sessile adult stage and aquatic lifestyle
D. gill slits and bilateral symmetry
E. leathery outer covering and an excurrent siphon


Answer: E

Biology & Microbiology

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In order to lose weight and reduce body fat, a friend of yours has decided to eliminate all fat from his diet, while consuming unrestricted amounts of carbohydrates. What do you think of this idea?  

A.  It is a good idea, because if your friend doesn't eat any fat, he cannot store any additional fat. B.  It is a bad idea, because consumption of fat is required to provide cofactors for the electron transport chain. C.  It is a good idea, because under conditions where ATP levels are low in cells, carbohydrates will be stored, and fat stores will be catabolized via beta-oxidation to generate energy. D.  It is a bad idea, because if ATP levels are high in cells, excess acetyl-CoA from the metabolism of carbohydrates can be used for fatty acid synthesis. Clarify Question What is the key concept addressed by the question? What type of thinking is required?   Gather Content   What do you already know about consuming carbohydrates and weight loss? Is excessive carbohydrate intake a good or bad idea? What other information is related to the question?   Choose Answer   Do you have all the information needed to determine whether or not excessive consumption of carbohydrates will help or harm your friend?   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

Imagine that you want all of the orange trees in your orchard to uniformly flower and set fruit. Which

type of plant hormone should you spray on your plants?

a. brassinosteroids b. auxins c. ethylene d. salicylic acid e. cytokinins

Biology & Microbiology

Cells that provide direct protection and physical support to neurons are

A) located only in the spinal fluid. B) found primarily in lymphatic fluids. C) myelinated. D) neuroglial cells. E) nodes of Ranvier.

Biology & Microbiology

Lysozyme is an enzyme that specifically recognizes bacterial polysaccharides, which renders it an effective antibacterial agent. Into what classification of enzymes does lysozyme fall?

(a) isomerase (b) protease (c) nuclease (d) hydrolase

Biology & Microbiology