What term best describes a driver of natural selection, such as competition for mates or predation by birds?
a. adaptive radiation
b. selection pressure
c. mutation
d. genetic variation
e. gene flow

What will be an ideal response?


Answer: b

Biology & Microbiology

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Messenger RNA molecules that direct the synthesis of more than one polypeptide are said to be ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Which of the following types of cells is matched with the wrong stem cell category?

A. embryonic stem cells: pluripotent B. embryonic germ cells: pluripotent C. hematopoietic stem cells: multipotent D. myeloid cell: unipotent E. zygote: totipotent

Biology & Microbiology

Which of the following pairs is incorrectly matched?

A. macrophage; class II MHC protein B. B cell; class I MHC protein C. B cell; IL-2 secretion D. helper T cell; CD4 E. cytotoxic T cell; class I MHC protein

Biology & Microbiology

Single-nucleotide polymorphisms (SNPs) are being used more and more in forensic analysis yet have not been fully embraced. However, SNPs have found an exemplary use in which of the following fields?

A) VNTR copy number studies B) epigenetic regulation studies C) evolution studies D) protein stability studies

Biology & Microbiology