Which best describes a gene?

A: different allele form of a trait

B: tightly coiled strands of DNA

C: the center of a chromosome

D: a segment of a chromosomal DNA

The dissolved oxygen in a reservoir was monitored for one year. Based on this data, what might greatly reduce the available dissolved oxygen in an aquatic habitat?

Which form of succession replaces an existing system after a calamity?

2) Which of Mendel's Law's describes when two or more characteristics ale inherited, individual hereditary factors assort separately during gamete production, giving different traits an equal opportunity of occurring together?

Why do some cells have more mitochondria than other

Electromagnetic radiation can contribute to the "sick-building" syndrome concern. a. true b. false

35. Which of the following is not a eukaryotic organism? a. Cow b. Tortoise C. Shark d. Bacteria

Which of the following usually is not a reason people choose to live in a given area? A. climate B. environment C. job availability D. number of schools

What does the title, "the metamorphosis" refer to?

Which of the following are dwarf planets? Check all that apply

Primary succession is most likely caused by