The biological species concept declares an organism to be a separate species if it has undergone evolution long

enough for the emergence of statistically unique traits.
_____________ Indicate whether the statement is true or false.


False - evolutionary

Biology & Microbiology

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How does an electromyograph (EMG) measure muscular contraction?

What will be an ideal response?

Biology & Microbiology

Stimulation of T lymphocytes, leading to their synthesis of a growth factor resulting in T lymphocyte proliferation, is an example of _______ signaling.

a. autocrine b. endocrine c. paracrine d. direct cell-to-cell

Biology & Microbiology

Normal blood pressure is 120/80. What is the top number called and what is happening in the heart?

A. diastolic pressure; ventricles are relaxing B. systolic pressure; ejection of blood from the heart C. diastolic pressure; atria are contracting, ventricles are relaxing D. diastolic pressure; ejection of blood from the heart E. systolic pressure; ventricles are relaxing

Biology & Microbiology

The practice of screening blood, blood products, and organ transplants for HIV has virtually eliminated the risk of HIV infection from these sources.

Answer the following statement true (T) or false (F)

Biology & Microbiology