Echinoderms are characterized by bilateral symmetry in adults, a water vascular system, tube feet, and spiny skin.

a. true
b. false


F, radial

Biology & Microbiology

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A monogamous couple is researching birth control methods. They want children in the future, and the woman

currently has high blood pressure. Which birth control method would be best for them? What will be an ideal response?

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Ritalin, like cocaine and amphetamines, acts by increasing the concentration of which neurotransmitter in neuronal synapses?

A) dopamine B) serotonin C) acetylcholine D) gamma-aminobutyric acid (GABA)

Biology & Microbiology

Scurvy is caused by a lack of which nutrient?

A) Calcium B) Vitamin D C) Vitamin C D) Omega-3 fatty acid

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Nicotine synthesis is an adaptation of plant chemical defense against insects

____________________ Indicate whether the statement is true or false.

Biology & Microbiology