Which of the following statements regarding vitamins is true?
A) They are simple inorganic compounds.
B) They must be ingested in large quantities.
C) They can serve as coenzymes or parts of coenzymes.
D) They are major sources of dietary calories.
Answer: C
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Plants are able to generate all of the substances they need for their metabolism using energy from the ____
a. soil b. air c. root d. Sun e. rain
Which element is a micronutrient in plants?
a. chlorine b. hydrogen c. potassium d. calcium e. magnesium
Scientists have found that extracellular matrix components may induce specific gene expression in embryonic tissues such as the liver and testes. For this to happen there must be direct communication between the extracellular matrix
and the developing cells. Which kind of transmembrane protein would most likely be involved in this kind of induction? A) integrins B) collagens C) actins D) fibronectins
Which two scientists proposed the unified cell theory?
a. Watson and Crick b. van Leeuwenhoek and Virchow c. Schleiden and Schwann d. Hooke and Pasteur