Alien species usually are aggressive invaders

What will be an ideal response?


Some alien species are aggressive, others aren't. It is not possible to know ahead
of time which invaders will exploit their new homes and become nuisances.

Physics & Space Science

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The light-gathering power of a telescope is directly proportional to

a. the diameter of the primary mirror or lens. b. the focal length of the primary mirror or lens. c. the ratio of the focal lengths of its primary mirror or lens and its eyepiece. d. the length of the telescope tube. e. the diameter of the eyepiece.

Physics & Space Science

The resistance of bacteria to certain antibiotics is a current example of

A) natural variety B) artificial selection C) un-natural selection D) natural selection

Physics & Space Science

In using ray tracing to graphically locate the image of an object that is placed in front of a mirror, describe three simple rays that you could draw that pass by the head of the object

What will be an ideal response?

Physics & Space Science

The common element discovered in the Sun's spectrum before it was found here is ________

Fill in the blank(s) with correct word

Physics & Space Science