A diatomic molecule is composed of two nonmetals, one with and electronegativity value of 2.0, and the other with an electronegativity value of 3.0. What type of bond exists between the atoms in this molecule? A) ionic B) polar covalent C) Hydrogen D) non-polar covalent
B) Polar Covalent
When I'm away at college, my sister borrows my clothes. She wears them, washes them, and puts them back, all without my knowledge. This relationship benefits her, but has to effect on me. What symbiotic relationship is this most like?
You have decided to conduct a study to understand more about the effects of sunlight on plant growth. Do do this, you plant 30 mung bean plants in three conditions: light (24 hrs/day under light), and typical (12 hrs/day under light). You monitor the growth of the plants and record plant mass after 14 days. 1) Was this a descriptive, correlational, or experimental study? 2) What is the independent variable? 3) What is the dependent variable? 4) What statistical analysis would you use to analyze the results from this study, and why?
1) This is an experimental study, due to the presence of a control group (the "typical," condition). 2) Light 3) Plant Mass 4) Two-tailed unpaired student t-test, as it would compare the means from the two experimental groups