15. The first known bird fossils date to which era of time?

A. Permian

OB. Triassic

O C. Jurassic

O D. Cambrian

To create a sense of balance and stability which part of a composition should have more white space

Which is not a deciduous tree

What type of wave moves audio and visual signals to your television? carrier waves transducer waves cable waves

Which best defines the population growth rate? A. a. (birth rate + immigration) - (death rate + emigration) B. (birth rate + fertility rate) - (death rate) C. birth rate - death rate

Why is acid rain harmful to the environment? this is from study island

Where are the most reactive nonmetals elements found in a periodic table

Which planet experiences the widest range of temperatures? A. Mars B. Mercury C. Earth D. Venus

Human tears contain an enzyme called lysozyme which damages the cell walls of bacteria. Which of the following best explains how this enzyme functions? A. Lysozyme kills bacteria by engulfing them. B.

What effect do you think aplastic anemia (reduced red blood cells) would have on blood flow?

How can sediment be transported into water