All life on Earth started as unicelluar, prokaryotic organisms. Which of these structures was vital for organisms to develop in order to evolve into more complex, multicellular organisms?

Which of these is a natural wood defect rather than a result of improper storage and conditioning? A) knot B) warp C) split D) stain

Suppose the climate in a habitat changes. Over time, the amount of precipitation decreases by 20 percent. How will this most likely affect the habitat? A. The organisms living in the habitat will not be affected by the change in climate B.

CO2 enters and O2 escapes from a leaf via. A) stomata. B) grana. C) thylakoids. D) stroma.

Which accident and health policy provision addresses preexisting conditions?

What is the relationship between biotic and abiotic factors?

Which region of the highlighted organ prolongs and amplifies the sympathetic (emergency) response?

A medical study was investigating if getting a flu shot actually reduced the risk of developing the flu. A hypothesis test is performed. Which of the following will result in a Type I error? a.

How can a catastrophic global event influence evolutionary change? Group of answer choices Undesirable versions of genes are removed. New genes are generated. Only some species may survive the event.

Collectively called the auditory ossicles. What do you call this membrane?

Where in the cells of the leaf do you find air spaces? what is the function of stoma?