Which class of vertebrates is considered to be the first to develop lungs, allowing them to become terrestrial organisms?

A) Reptilia

B) Aves

C) Mammalia

D) Amphibia

By what process do autotrophic organisms convert solar energy into chemical energy

One of the neurotransmitters can become decreased in the area of the corpus striatum. This results in the manifestations of Parkinson's disease. Which neurotransmitter will cause this?

Explain why a signal cascade can be useful in certain cell processes

How are the heads of vultures adapted to what they eat?

How does sand silt and Clay affect soil nutrients and plants

Inpatient Consultation This 25-hour-old male infant has Down syndrome. Upon exam there is a cardiac murmur that varies in frequency. EKG demonstrates a left and right ventricular hypertrophy.

Choose the neurotransmitter that best fits each definition or description. 1. crosses the synapse between a motor neuron and a muscle fiber to produce a muscle contraction. 2.

In what two places on plants do seed grow?

Which statement describes gravity? Check all that apply There is no defined unit of measurement for gravity Gravity is the force that pulls objects toward Earth's center Objects that have a small mass will have no gravitational pull Gravitational

Which statement about crustaceans is true? * (A) all have the same number of appendages (B) all have an internal skeleton (C) all have an exoskeleton (D) only some have jointed appendages