Answer:
To determine that electric beams in cathode ray tubes were actually made of particles
Explanation:
I hope this is correct, if it isn't then feel free to let me know and I will correct it. I'm sorry in advance if it is incorrect.
There is not any options but the parts of Lac Operon is:
Promoter
Repressor
Operator
Genes
Hope this helps!
Answer:

Explanation:
An element only has <u>one</u> type of atom and cannot be broken down by chemical means.
Let's analyze the answer choices.
1. This has two types of atoms, so it cannot be an element. It has more than one type of atom.
2. This has two types of atoms that are bonded together. It cannot be an element because there is more than one type of atom and the bonds can be broken.
3. This has one type of atoms, so it is an element.
Therefore the best answer choice is 3.
They compete for water, food, and territory or mates. Competition oftenly happens between the same species and members called intraspecific competition which is basically the type of competition that is driving force behind the natural selection within a species.
Answer:
on forest floors in shady places