The plants first appeared in the ordovican period

True or False

Release of CFCs and similar compounds are a possible cause of A destruction of ozone in the upper atmosphere B greenhouse gas build-up in the lower atmosphere C increase in atmospheric carbon dioxide concentration D acid rain in the northeast U. S.

Is a watermelon a gymnosperm plant or a angiosperm plant

Why do we need to destarch a plant

Giraffes can grow up to 6 yards how tall will that be in feet?

Describe how natural variation is used in artificial selection

Why are atoms so important?

Which of the following is the best example of homeostasis in the human body? and why?

Dna determines the structure of proteins produce by cells?

What does a organism that is still has many cells produce spores and gets food from the enviroment

What are the main features of a eukaryotic cell? How do these features differ from those found in Bacteria and Archaea?2.