Fingernails are a component of the ________ system
A) respiratory
B) integumentary
C) muscular
D) skeletal
Answer: B
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Who first described cells?
A. Linnaeus B. Golgi C. Darwin D. Leeuwenhoek E. Hooke
In the context of population genetics, what is meant by the term "fitness?"
What will be an ideal response?
The cell wall ____
a. provides physical support for plant cells b. controls the transport of materials out of the cell c. replaces the plasma membrane in plant cells d. is found in all eukaryotes e. prevents the transport of toxic substances into the plant cells
Which of the following is true of gene regulation?
1.Different genes are present in different tissues, leading to differentiation. 2.Operons are made up of promoters, enhancers, and exons. 3.In prokaryotes, gene regulation is predominantly a response to environmental conditions. 4.Histones bind to promoter regions of genes and act to inhibit methylation.