A. prevent cross-contamination.
Tubes that lead from the heart to the rest bud
The first thing that the farmer should do is formulate a hypothesis in which he will make intelligent guesses on what is happening or develop a theory of which would explain what is happening. It is the first step in scientific investigation in order to formulate questions of why weeds that are sprayed does not die. After this, it is only then the farmer should experiment and after that, he should finalize his findings as it is its conclusion to the problem.
Mars and Moon are the locations from which meteorites would come.
Option (c);
<u>EXPLANATION: </u>
- The meteorites found on Earth look like martian crystal rocks.
- These might be first ejected into space during a collision of an asteroidal object with Moon or Mars and then it got into the Earth orbit because of the force produced during the collision.
- There are around seventy meteorites recognised to have come from the planet Mars till up to the present date.
- There are three types of meteorites such as Martian meteorites and a sample of two lunar meteorites.
- To identify the origin of the meteorite, the scientist tries to identify the type of rock followed by analysing the chemical composition and then try to identify its age.
The cells are producing carbon dioxide and water. By taking in oxygen, the one performing cellular respiration releases carbon dioxide into the air.
