What characteristics define mammals?

What will be an ideal response?


All mammals produce milk. In addition, all have hair/fur and four kinds of teeth. Mammals all fit into one of three categories of milk producers: monotremes, marsupials or placentals.

Biology & Microbiology

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In bacteria living next to hot deep sea vents the usual electron donors are?

A. Carbon compounds B. Iron atoms C. Copper ions D. Sulfur compounds

Biology & Microbiology

The sex of most mammals, birds, and insects is determined by:

a. the temperature. b. the external environment. c. sex chromosomes. d. chance. e. the internal environment

Biology & Microbiology

The tempo of the heartbeat is set by a cluster of specialized cardiac muscle cells called the ________

Fill in the blank(s) with correct word

Biology & Microbiology

Compare and contrast between the following types of mutations: missense, nonsense, silent, and neutral

What will be an ideal response?

Biology & Microbiology