Denise heard that little children pick food based upon color. she read many studies about food color and selection. she learned when foods are not the color people expect, it makes them think the flavor is different. to test this, she offered 100 kindergarten children colored mashed potatoes for lunch. the colors served were red, yellow, green, and blue. as the students selected the mashed potatoes, she wrote down which color each student selected. she then counted how many students selected each color. there is an experimental design flaw in denise’s experiment. what part of the experiment does it involve? a. independent variable b. dependent variable c. control d. replicates

On a recent expedition to a remote region of northern canada, scientists uncovered skeletal remains from about 100,000 years ago. surprisingly, all the skeletal remains, which included many species from differing biological families and spanned about two thousand years, showed evidence of experiencing temperatures in excess of 1000 degrees fahrenheit (or 538 degrees celsius). which of the following, if true, best explains the apparent paradox between the cold environment and the evidence of the bones experiencing hot temperatures? (a) chemical changes that naturally occur during the process of decay in only one north canadian species produce the same evidence of the species' skeletons being exposed to hot temperatures as the expedition scientists found. (b) a little over 103,000 years ago, a large fire is known to have occurred in northern canada. (c) strong evidence exists that as early as 70,000 years ago, homo sapiens around the world relied heavily on fire to cook animals. (d) in the same expedition and in roughly the same layer of excavation, scientists found rudimentary wood cutting and hunting tools used by early humans.

Look at the photo of the leaf. which term best describes this leaf?

What was the purpose of mendel's experiments with dihybrid crosses? a. to determine if dna was a transforming factor b. to determine if traits could be recessive c. to determine if traits affected each other d. to determine if traits had more than one allele