What is a galaxy? a) all the billions of stars that exist in space b) a cluster of millions of stars in a definite pattern in space c) one or more planets orbiting around a star, similar to our sun d) a cluster of stars, planets, gas, and dust all held together by gravity

Provide one reason why mitosis occurs.

This question is only for applicants to scholars for medicine or scholars for dental medicine: what aspects about medicine (or dental medicine) intrigue you? describe how these aspects influence your life. (100-650 words)

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?