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

Earths energy sources include both renewable and no renewable resources name a time least three sources o energy that could be used

When observing a culture of S. cerevisiae under the compound microscope, you observe that most of the cells have buds of various sizes. The culture is most likely in which growth phase?

The purpose of metaphylaxis is to: a. cure disease among an entire population of animals. b. improve the nutritional value of meat, fish, and poultry. c. both cure and prevent disease among an entire population of animals. d.

during a trip to Galapagos islands which observation lake Charles Darwin to suspect that organisms change over time

How are the four earths systems connected

Explain how deep water currents affect the number of organisms found in the area by circulating nutrients.

If an element has a mass number of 244 and an atomic number of 94, how many neutrons does the element have? A. 94 B. 244 C. 155 D. 150

The concentration of atmospheric carbon dioxide is currently decreasing due to human activities. t or f?

What do the data suggest about the effects of cane toads on the predatory behavior of black snakes in areas where the toads have been present for 40-60 years? a.

What are the two main divisions of the nervous system called?