Why might a scientist repeat an investigation and not get the same results?

During a stressful or threatening situation, which of the following is the best description of how the nervous systems in your body would respond? A.

Motor signals are sent by the brain to effectors. which is an example of an effector?

how do basic trends in hominid evolution from early ancestors to modern human support the theory of evolution?

Which type of substance is an environmental contaminant that causes harm to living organisms?

Since the supercontinent Pangaea split up ~200 million years ago, the continents have remained in essentially the same positions. Do you agree?

What is the concentration of KCl if 10 g are dissolved in enough water to make 12 L?

10. The kidney is an organ that collects wastes and excess water from the blood and sends them to the bladder where they are stored before being removed from the body.

3) In regards to sunspot activity, we are presently ...

Which inheritance pattern results when parents are crossed for pure traits and the resulting offspring have traits tha blend? O incomplete dominance O codominance O Mendelian inheritance O polygenic inheritance

How many different species are there? kings and kigdoms