Turbellarian flatworms have a distinct head. When comparing the heads of these flatworms to insect heads, what is it missing?

A. Sensory organs
B. Anterior collection of nerve cells
C. A mouth
D. Light sensitive structures


Answer: C

Biology & Microbiology

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If you were to replace the phosphate group of a phospholipid with a fatty acid chain, you would have  

A.  glycerol. B.  a triglyceride. C.  cholesterol. D.  glycolipid. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about the structure of a phospholipid? What other information is related to the question? 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

Which one of the following structures in the moss life cycle is not haploid?  

A.  germinating spore B.  antheridium C.  sperm D.  spore mother cell E.  rhizoid tissue

Biology & Microbiology

The probability that a boy whose mother is heterozygous for an X-linked trait inherits the recessive allele is

A) 1/16. B) 1/8. C) 1/4. D) 1/2.

Biology & Microbiology

_________ can be used to disinfect water, food, and surfaces.

A) Chlorine compounds B) Phenols C) Alcohols D) Hydrogen peroxide

Biology & Microbiology