Which statement best describes the first law of thermodynamics?
a. Matter can be created and destroyed.
b. Matter only changes forms.
c. Energy only changes forms.
d. Energy can be created and destroyed.
Ans: c. Energy only changes forms.
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DNA stores the information needed for the synthesis of cellular _______
A. proteins B. carbohydrates C. lipids
The primary functions of the extracellular matrix is protection and support
Indicate whether the statement is true or false.
The KN-1 gene in maize is normally expressed
a. in primary meristems, where it initiates the process of differentiation. b. in apical meristems, where it maintains the undifferentiated state. c. in apical meristems, where it initiates the process of differentiation. d. in primary meristems, where it maintains the undifferentiated state. e. in lateral meristems, where it initiates the process of secondary growth.
Which of the following is a product of DNA replication?
a. a new strand of DNA b. rRNA c. tRNA d. mRNA