Answer:
It's important for a scientist to try to hold all variables constant except for the independent variable. If a control variable changes during an experiment, it may invalidate the correlation between the dependent and independent variable. When possible, control variables should be identified, measured, and recorded.
Answers:
Yes , restrictions should be given on who can buy explosives. In short only authorised officers should always investigator users of explosives, they should investigate safety and security matter that has to do with explosives. They should make a strict regulations and penalty for defaulters. I think advice should be given users and buyers that has access to, explosives to protect public safety, property and the environment.
Answer:
Animals only is the correct answer
Explanation:
Hope this helps you
Crown me as brainliest:)
Answer:
C
Explanation:
Humans are the most evolved species in the phylogeny
Phylogeny in biology pertains to the evolutionary history or development of a group of organisms, such as a tribe or a racial group.
Human happen to be at the top of this evolutionary history
