Choose all the answers that apply.
producers:
release oxygen into the air
release carbon dioxide into the air
make their own food using photosynthesis
get their energy directly from the sun
are the start of all food chains

Which term describes the number of waves that pass a given point in a given time? crest frequency trough wavelength

Astudent wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. the student measured the growth at the end of the week. all plants received equal amounts of water and sunlight. if you were asked to graph this data, what would you place on the x-axis? a. fertilizer b. water c. plant growth d. week one

The ruiz family is exchanging euros for us dollars. the exchange rate is 1 euro equals 1.35261 usd. since the ruiz family knows that usd are stated to the nearest hundredth of a dollar, they used the conversion ratio