Edwin Hubble discovered that:

Cepheids have patterns of brightness.

Stars have absolute and apparent magnitudes.

The planets move in elliptical orbits around the sun.

Galaxies in the universe are moving away from the earth.

If like charges repel, how are protons forced together in the nucleus?

A protozoa is a A. type of proton B. one celled animal C. type of fish D. none of the above

What particle of matter is smallest? Quarks, atoms, protons, neutrons

Which of the following is a characteristic of meiosis but not of mitosis? involves only one cell division involves only single-celled organisms produces four daughter cells separates one existing cell into two identical new cells?

A cross between homozygous red-eyed flies and homozygous white-eyed flies results in progeny that all have red eyes. this result demonstrates:

Which statement explains the difference between multiple alleles and polygenic inheritance? A. Multiple allele means more than one gene contributes to the phenotype and polygenic inheritance means more than two forms of the same gene in the

Select all that apply. Which of the following are characteristics of Cnidaria? radial symmetry acoelomates bilateral symmetry coelomates asexual reproduction sexual reproduction

Which of the following correctly arranges the planets by the size of their diameter? A) Uranus < Neptune < Mercury < Earth B) Earth < Mercury < Neptune < Uranus C) Mercury < Earth < Saturn < Jupiter D) Jupiter < Saturn < Earth < Mercury

How does ultra radiation cause skin cancer

How many ribose molecules are found in ATP?