Anaerobic photoautotrophs were the first organisms to release oxygen into the early atmosphere.

a. True

b. False

Name the main gases that diffuse into and out of the blood in the lungs. Into the blood Out of the blood

What is the medium in which sound travels inside a bird's body?

Suppose that a 120.0 g solution contains 100.0 g of water and 20.0 g of dissolved sugar. What is the approximate concentration of sugar in the solution, by mass? 83.3% 20.0% 16.7% 14.3%

Which descriptions refer to fog? Check all that apply. burns off when it gets dark forms at or near the ground extends up to 10 miles into the sky found in areas near bodies of water forms when the ground warms at night after a cool, dry day

Define Mendel's law of independent assortment. Group of answer choices The expression of one gene has no effect on the expression of another gene. There are two versions of each trait, a dominant and a recessive; the one you get is random.

Which of the following terrestrial biomes cannot be found in the United States? A: temperature deciduous forest B: tundra C: desert D: grassland/prairie

Which of these food sources does the bald eagle not feed on? plants fish carrion mammals

what will happen to a base isolated building when seismic wave strike the building during an earthquake

The shape and size of a birds beak would mostly be affected by what environmental limiting factor

Why do you think scientists use the word mutate to describe the genetic process shown in the video