Earthworms have a(n) ____

a. exoskeleton
b. endoskeleton
c. hydrostatic skeleton
d. segmental skeleton
e. squishy skeleton


ANSWER: c

Biology & Microbiology

You might also like to view...

After ingestion of a food particle, pH changes and enzymes contributed by the ________ will digest and hydrolyze the ingested particle in the phagocytic vacuole.

A. mitochondria B. endoplasmic reticulum C. lysosome D. plasma membrane

Biology & Microbiology

The formation of proteins has been altered in a patients body by high temperature leading to the protein being broken down immediately after synthesis. The best description of this is

A. re-translation of proteins. B. post-translation is occurring. C. proteins are in a catabolic process. D. proteins are in a cotranslational process. E. proteins are engaged in an anabolic reaction.

Biology & Microbiology

On a trip to the beach, you find a multicellular organism whose cells have chloroplasts and cell walls. Based on this description, you know that the organism could be a brown alga, a red alga, a green alga, or a land plant washed into the ocean. The presence of which of the following would allow you to definitively identify this organism as a plant?

A) Multicellular embryo B) Starch C) Cellulose D) Alternation of generations E) Chlorophyll a

Biology & Microbiology

What is an advantage of cloning horticultural crops rather than using sexual propagation to grow them?

A) Cloned plants are healthier and less susceptible to disease. B) Cloning plants allows for large production of plants with minimal effort and expense. C) Cloned plants grow more slowly but have stronger stems. D) Cloning provides more variation in flower color and size with minimal effort and expense.

Biology & Microbiology