A layer of endodermal cells around the cylinder
deposit a waterproof band called a __________ in
their abutting walls. Fill in the blank(s) with the appropriate word(s).
Answer: Casparian strip
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Which connective tissue contains fibroblasts?
a. blood b. adipose c. cartilage d. bone e. loose connective tissue
The structure indicated by the letter "B" above represents _____
a. actin b. a myofibril c. myosin d. the sarcoplasmic reticulum e. a muscle fiber
When would Koch's postulates be utilized?
A. to determine the cause of a new disease in a microbiology research lab B. to determine the cause of a patient's illness in a hospital microbiology lab C. to develop a new antibiotic in a pharmaceutical lab D. to formulate a vaccine against a new pathogen in a genetic engineering lab E. whenever the scientific method cannot be used to investigate a microbiological problem
In protostomes
A) the opening formed during gastrulation becomes the mouth. B) the opening formed during gastrulation becomes the anus. C) there is no body cavity. D) there is no endoderm.