Answer:
1.
•After the left ventricle contracts, the aortic valve closes and the mitral valve opens, to allow blood to flow from the left atrium into the left ventricle.
•As the left atrium contracts, more blood flows into the left ventricle.
•When the left ventricle contracts again, the mitral valve closes and the aortic valve opens, so blood flows into the aorta.
2.
•Diffusion is defined as the movement of individual molecules of a substance through a semipermeable barrier from an area of higher concentration to an area of lower concentration.
Explanation:
The answer is d. <span>antipsychotics. </span>Risperidone (Risperdal, Janssen, and generics), a second-generation antipsychotic is the first drug issued by the FDA to treat Autism Spectrum Disorder (ASD). <span>The </span>antipsychotic<span> drug Risperdal may cut aggressive behavior in children with </span>autism<span>.</span>
Answer:
Explanation:
plate bourndies and seafloor spreading
The physiological subset of birds are - 1) spirits 2) fat accumulation 3) gonadal development 4) gonadal degeneration 5) napping 6) fat accumulation.
Answer:
C. A hillside that has been cleared by a volcanic eruption.
Explanation:
Pioneer species are hardy species which are the first to colonize barren environments or previously biodiverse steady-state ecosystems that have been disrupted, such as by fire or other natural disasters. Some lichens grow on rocks without soil, so may be among the first of life forms, and break down the rocks into soil for plants.
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