They use tools to help take precise measurements, carry out experiments, and make observations.
Answer: The hardness of a mineral.
Explanation:
(give brainliest please!)
Answer:
C. Jenny counts the eggs laid by each chicken for a month.
Explanation:
The answer C represents data being collected because it involves numerical data instead of thoughts.
A. The DNA is duplicated.
There are three steps in Interphase: G1, Synthesis, and G2. G1 is growth, Synthesis is duplication, and G2 is more growth.
Hope I helped! :)

¿What are invertebrates?
Invertebrates are unicellular or multicellular organisms that present a great variety of habits and morpho-functional patterns.
Which are classified into :-
Anthropods, molluscs, worms, echinoderms, coelenterates, and porifera.
I hope I've helped : )