Atmospheric pressure is measured with a/an and is commonly expressed in .
a. anemometer, kilometers per hour
b. barometer, millibars
c. thermometer, degrees celsius
d. hygrometer, a percentage

Which of the following structures is not found in both plant and animal cells? a) chloroplast b) cytoskeleton c) ribosomes d) mitochondria

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?

What are the three different shapes or structures shapes or structure of carbon-based molecules?