Quiz 1 Flashcards
Name the three domains of living things
bacteria, archaea, and eukaryotes
all of the American crows (Corvus brachyrhynchos) here on campus are a:
population
all of living things and the non-living things they interact with (for example soil, water) here on campus are the:
ecosystem
one gene is the instruction to make one
protein
atoms of the same element have the same number of:
protons
a researcher wishes to understand the effect of a new cattle feed on the milk yield of dairy cattle. The hypothesis is:
The new cattle feed will increase the yield of milk from dairy cattle
The researcher takes two cows. one cow was fed the new cattle feed, the other was fed the old industry standard cattle feed. The cow fed the new cattle feed produced 25% more milk over a month than the cow fed the industry standard cattle feed.
What was the dependent variable?
the yield of milk
a researcher wishes to understand the effect of a new cattle feed on the milk yield of dairy cattle. The hypothesis is:
The new cattle feed will increase the yield of milk from dairy cattle
The researcher takes two cows. one cow was fed the new cattle feed, the other was fed the old industry standard cattle feed. The cow fed the new cattle feed produced 25% more milk over a month than the cow fed the industry standard cattle feed.
What catastrophic error did the researcher make?
the researcher used only one cow of each treatment group. All experiments need to be repeated
Ethylene (C2H4) is a hydrocarbon composed of nothing but carbon and hydrogen. Ethylene has a molecular weight of 28. Water (H20) has a molecular weight of 18. Although Ethylene is far heavier than Water, Ethylene is a gas at room temperature; Water is a liquid at room temperature. Why?
Ethylene is a non-polar molecule, so the ethylene molecules are not attracted to each other. Water is very polar, so the water molecules are attracted to each other strongly, forming a liquid
A atomic interaction caused by an atom sharing a pair of electrons is called a
covalent bond
a researcher wishes to understand the effect of a new cattle feed on the milk yield of dairy cattle. The hypothesis is:
The new cattle feed will increase the yield of milk from dairy cattle
The researcher takes two cows. one cow was fed the new cattle feed, the other was fed the old industry standard cattle feed. The cow fed the new cattle feed produced 25% more milk over a month than the cow fed the industry standard cattle feed.
What was the independent variable?
the cattle feed
