When lungs evolved in vertebrates, the evolution of _____ also occurred in the circulation of blood within those vertebrates.  

A.  a muscular heart
B.  more plasma
C.  a lymphatic system
D.  red blood cells
E.  double circulation


E.  double circulation

Biology & Microbiology

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____ is the capacity to do work

Fill in the blank with the appropriate word.

Biology & Microbiology

The Ethical, Legal, and Social Issues program seeks to deal with issues related to privacy, fairness, discrimination, and

reproductive decisions that emerge due to the availability of genomic information. a. True b. False

Biology & Microbiology

Which of the following groupings of organs is responsible for the maintenance of water balance in the body?

A) liver, kidneys, hypothalamus B) heart, liver, posterior pituitary C) posterior pituitary, hypothalamus, kidneys D) kidneys, hypothalamus, liver E) posterior pituitary, bone marrow, kidneys

Biology & Microbiology

The eastern meadowlark and the western meadowlark are two bird species that look very similar to each other. Why do biologists not consider them the same species?

A) Species are not determined by appearance but by their ability to interbreed naturally. B) The two species do not live in the same habitat and thus do not interbreed in nature. C) The two species experience the reproductive barrier of habitat isolation. D) All of the above are correct.

Biology & Microbiology