A controlled experiment allows the scientist to isolate and test

a a conclusion,

b. one variable

c. several variables.

d. a mass of information.

During an El Niño year, there is increased precipitation in the Southern United States, but the north is warmer and dry.

Compare sequence 4 with sequence 1 and describe the mutation that has occurred

There's a good evidence that a meteor hit earth about 65 million years ago which of the following events that the scientist think were triggered by the impact could have caused the Simultaneous global extinction of multiple species including all of

A student observes a leaf epidermis under a microscope. it has many stomata but they all appear closed. this epidermis was most likely from:

True or false. Most of the DNA in the human genome codes forgenes.

Smooth muscle is found in just one place in the body. true or false

Which of the following characteristics evolved independently in mammals and birds? A) bilateral symmetry B) amniotic eggs C) jaws D) bone E) endotherm

A client is heard saying, "i like eggs, fried by meg, served on a keg, kicked in the leg and don't want her to hoopanize them ever again." what should the nurse note in the client's record?

Explain how unfavorable traits can disappear in a specie

Myoglobin, and iron - and oxygen-binding protein found in the muscle tissue of vertebrates, is 0.316% fe by mass. if a myoglobin molecule contains one iron atom, what is the molar mass of myoglobin?