Biology 105 Final exam

Compared to a solution at pH 4, the same volume of a solution at pH 3 has _____ times more H+?

10

covalent bond

A chemical bond that involves sharing a pair of electrons between atoms in a molecule

What is the difference between a hypothesis and a theory?

A hypothesis is a proposed explanation for a phenomenon. A theory is a hypothesis for natural phenomena that is exceptionally well-supported by the data.

How is a hand with a thumb a good example of the relationship between structure and function in biology?

A thumb is used to grip onto items and it is also use to gain control over an item.

What are examples of interaction between biological systems?

A wolf eating a deer which is predation.

Which statement about ecosystems is false?

Bacteria and fungi recycle energy within an ecosystem

Domains

Bacteria, Archaea, Eukarya

Which of the following statements regarding carbon is false

Carbon has the ability to bond with up to six other atoms

How do mitochondria differ from chloroplasts?

Chloroplasts convert light energy from the sun into chemical energy, whereas mitochondria convert chemical energy into other forms which power the cell.

Which of the following categories would YOU be a member of? (select all that apply)

Domain Eukarya and Kingdom Animalia

How does energy flow through the biological world? Does matter move in the same way?

Energy can neither be created nor destroyed but it can be converted into other forms of energy. For instance, energy gets converted or transferred to organisms in a food web. Matter doesn't not transfer in the same way but gets recycled.

Which of the following is a group within the domain Eukarya?

Fungi

Which of the following statements is not consistent with Darwin's theory of natural selection?

Individual organisms experience genetic change during their life spans to better fit their environment.

Which statement or statements below about ionic bonds are TRUE? (Choose all that apply)

It is the bond that happens between two charged atoms... It involves the sharing of an electron..

What are the steps of the process of science?

Make an observation. Ask a question. Form a hypothesis, or testable explanation. Make a prediction based on the hypothesis. Test the prediction. Iterate: use the results to make new hypotheses or predictions.

polar

Molecule with partial charges. Mixes with water.

Which statement about natural selection is true?

Natural selection acts on the genetic variations that already exist in a population.

Emergent Properties

New properties that arise with each step upward in the hierarchy of life, owing to the arrangement and interactions of parts as complexity increases.

nonpolar

No partial charges. Do not mix with water.

What feature of fats makes them hydrophobic?

The glycerol and fatty acids are both non-polar

Having a high fever for a long period of time can be dangerous or even fatal because;

The proteins in our cells will lose their natural shape (denature) and will not be able to function properly.

Which molecules can freely diffuse (move) across the plasma membrane?

a positively charged ion small molecules like oxygen and carbon dioxide

A hypothesis is

a proposed explanation for a set of observations

Which statement or statements below about proteins are TRUE?

all proteins are made of amino acids.... the structure of a protein can be effected by heat and pH. proteins are a found in the cell membrane

Which of the following is an example of secondary structure in a protein?

an alpha helix

What is the "control" in a scientific experiment?

an experiment that is used as the standard for checking the results of an experiment where other variables are changed

Theory

an explanation using an integrated set of principles that organizes observations and predicts behaviors or events

In an ecosystem the chemicals such as carbon and nitrogen

cycle between organisms and the environment

All living things can be classified into three major groupings called

domains

The tail of a fish can move in a way that individual cells cannot. This is an example of

emergent properties

The cells of the nervous system send signals to your muscles which causes your leg to move in a way that individual cells could not. This is an example of

emergent properties of cells.

The short term energy storage form for glucose is ________ in animals and ________ in plants

glycogen; starch

A preliminary explanation for a set of observations would be a

good beginning to establish a theory

Life is organized in a hierarchical fashion. Which sequence correctly lists that hierarchy from least inclusive to most inclusive?

molecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem.

According to the work of Charles Darwin, __________ is the force that can lead to evolution.

natural selection

Which statement about the properties of life is false?

only some organisms have the ability to capture energy and use it.

What are the defining features of life (organisms)? (select all that apply)

response to the environment.... growth and development.... ability to access and use energy..... maintaining the internal environment.....

To be scientifically valid, a hypothesis must be

testable.

Metabolism

the chemical processes that occur within a living organism in order to maintain life.

Heredity

the passing on of physical or mental characteristics genetically from one generation to another.

What evidence supports the theory of endosymbiosis for the development of cells with mitochondria and chloroplasts?

the presence of circular DNA in mitochondria and chloroplasts...... the size of mitochondria and chloroplasts is similar to that of modern day bacteria..... the double membrane around mitochondria and chloroplasts..... mitochondria and chloroplasts divide by fission, the same method observed for bacteria.......

Many animals that eat plants have broad and ridged that are suitable for grinding and chewing plants. This illustrates

the relationship between structure and function

How can a single cell be a living thing?

they can utilize energy (ATP), grow, reproduce, and perform basic functions needed to survive.

A disaccharide forms when

two monosaccharides join by dehydration synthesis

In an ecosystem, energy

typically flows from producers to a series of consumers.

hydrogen bond

weak attraction between a hydrogen atom and another atom