Answer: Protons
Explanation: Every atom is defined by its protons every element. So if it has 1 proton its hydrogen no matter what. If it has 2 protons its helium no matter what and so on. So if you know the number of protons you know the element.
The atomic number tells you the number of protons that are in the core of a particular element.
Answer:
Una célula vegetal contiene una gran vacoula única que se usa para almacenamiento y para mantener la forma de la célula. En contraste, las células animales tienen muchas vacuolas pequeñas. Las células vegetales tienen una pared celular, así como una membrana celular.
Answer:
D
Explanation:
Absolute age is defined as the numeric age of fossils.
To identify the absolute age of a fossil, the amount of certain radioactive elements in the rock are measured. When fossils are formed in the rocks, a small amounts of radioactive elements is included in it. The process to identify age of fossil using radioactive elements is known radiometric dating. So, radioactive isotope and its decay product gives absolute age of fossils.
Hence, the correct answer is "D".
There is no set lifespan.It can live as long as the environment can support its life. However the average lifespan differs for each particular species, with an average life expectancy from a few days to a year or two.
:)
Answer:
scientist can use this information to grow crops with larger fruits and vegetables.
Explanation:
i had this question on USA test prep and i guessed because i couldn't figure it out and when i guessed i got it right because i chose B or what ever the answer choice is for the correct answer.
