Which variable stars have pulsation periods between 1.5 hours and 1.2 days?

A. Cepheid variables

B. RR Lyrae variables

C. Protostars

D. Quasars

What combination of boundary type and crust type creates enormous mountains?

Find an example of an exotic species that has beenintroduced in an ecosystem with negative effects. Select a speciesthat is causing a problem near you. Explain the impact and what youthink could have been done differently to lessen the impact.

Describe what digestion begins in the mouth

Why would a drop in blood pH have an undesirable effect on the proximal histidine's function? a. A drop in pH would make deprotonation more likely, and a deprotonated proximal histidine would be able to hydrogen bond to O2 to stabilize its binding

Which organisms are responsible for the majority of the net primary productivity in shallow marine waters? A. zooplankton B. phytoplankton C. bacteria D.

The two most important regulatory systems for the maintenance of homeostasis are Circulatory and nervous Endocrine and circulatory Lymphatic and circulatory Nervous and endocrine

Difference male and female reproductive system anatomy

What will most likely happen to a healthy male who has an excess of testosterone

A woman reports to the emergency room in january with her cyanotic (blue-colored) 10-month-old child. the mother reports that the infant has had a runny nose, fever, and slight cough for a day and has had increasing trouble breathing.

What type of virus is HIV?