PLEASE NEED CORRECT ANSWERS ASAP 40 POINTS Gastric juices are secreted by glands which are located in the .

small intestine
mouth
stomach
pancreas

Match these items.

1. absorbs most ultraviolet rays

stratosphere
2. lowest layer of the atmosphere

greenhouse effect
3. starts seven miles above the earth

thermosphere
4. layer composed of layers

troposphere
5. important for its radiowave reflection

ozonosphere
6. trapping of heat by earth's atmosphere

ionosphere

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

Astudent sees several ants walking up a wall following the exact same trail that an ant took earlier. she wants to apply the scientific method to determine how the ants detected the trail. which of these steps would come first in her application of the scientific method? perform an experiment by cleaning the scent away from part of the trail. draw a conclusion that the ants follow a scent trail. make a prediction about what the ants will do after she cleans away part of the trail. hypothesize that the ants are following a scent trail that the first ant left.

Which of your fossils are most likely heterotrophs? which of them are autotrophs? how do you know?