Biology 100 Exam 1

All else being equal, which of the following is least likely to evolve via natural selection?

a population with no genetic variation

Which of the following is a null hypothesis?

Higher temperatures are not associated with greater rainfall

Which of the following individuals likely has the highest biological fitness?

an individual that has many genetic offspring

Which of the following is NOT a component of Cell Theory?

cells can only attain a certain size before needing to divide

COVID-19 is the first pandemic to strike the United States.

False

Science as a philosophy has a number of unique characteristics. Based on our discussion in class, which of the following is NOT one of these attributes?

always correct

Lactase is an example of a(n):

enzyme

Which of the following is NOT a unique characteristic of water?

low heat capacity

Which of the following is true of evolution in a biological context?

populations evolve

Insulin is an example of a(n):

protein

The fact that electrons in a water molecule are far more attracted to oxygen rather than hydrogen results in:

the hydrogen "end" of the molecule having a slightly positive charge

Correlation and Causation

A correlation is a statistical indicator of the relationship between variables. Causation means that changes in one variable brings about changes in the other; there is a cause-and-effect relationship between variables.

What organisms deal with osmosis by producing dilute urine and actively transporting salts into their cells?

Freshwater fish

Which of the following is NOT one of the most abundant elements in living things?

calcium

Cohesion (a property of water) results from what type of bond?

hydrogen bond

Which of the following will NOT increase the accuracy of predictions regarding the spread of a disease in a population?

knowing where the disease originated

Endocrine Disrupting Pollutants (EDCs) are compounds that:

mimic hormones in organisms, and influence how hormones work in organisms

When Carbon-14 undergoes radioactive decay, it sheds a beta particle and becomes:

nitrogen-14

Where are a Fiddler Crabs taste buds?

on their feet

When water moves freely across a semipermeable membrane from high to low concentrations, we refer to the process as:

osmosis

Which of the following has a positive charge?

protons

A neutrally charged atom has the same number of:

protons and electrons

A monosaccharide is a(n):

single ringed sugar molecule

If you've been following the news, you've probably heard about new or updated models projecting the spread of COVID-19 in the coming months. Over the last two years, the projections of these models have changed repeatedly. How do these changing projections reflect on science as a process?

they show that science is a process, with more information scientific models and predictions can be improved