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.
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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
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
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
Compare and contrast between the following types of mutations: missense, nonsense, silent, and neutral
What will be an ideal response?