Proteins within muscles interact, causing the whole muscle to shorten (contract). Which is the emergent property?
- interaction of the proteins
- contraction of the muscle
Which of the following would a biologist study? Select all that apply.
- How bacteria respond to antibiotic treatments.
- How algae interact with various fish.
- How to produce new varieties of corn plants.
- How earthquakes can be better predicted.
Read the following statements. Which one is NOT an example of the characteristics of life?
- Your body gives off heat after running up several flights of stairs.
- Drinking water after perspiring while working in the garden on a hot day.
- A single-celled organism dividing into two separate organisms.
- A fertilized egg developing into a young chick.
- All of the examples above demonstrate characteristics of life.
- None of the examples above demonstrate characteristics of life.
This level of organization is the defining level of biology. As far as we know, life is an emergent property that exists at this level. Below this level, no single entity is truly alive.
On the surface of the eye is a transparent, flexible covering called the cornea. This structure would best be classified as a…
- organ system
Which is the correct order from smallest to largest?
- Cell < Tissue < Molecule < Organ
- Cell < Molecule < Tissue < Organ
- Molecule < Tissue < Cell < Organ
- Molecule < Cell < Tissue < Organ
A cleaning product claims it “kills 99.9% of germs and viruses.” Explain the flaw in this statement.
Viruses are also ‘germs’. They deliberately leave out bacteria and give you only a 99.9% guarantee – this is a defense mechanism in case you use their product and get sick.
Your thoughts arise from signals that zip around through a network of nerve cells in your brain. Which is the emergent property?
- Your nerve cells.
- Your thoughts and your ability to think.
- Your brain.
Your aquarium contains three goldfish, one turtle, some plants, and millions of bacteria and algae. All those organisms together form a(n):
Aristotle’s statement “The whole is much greater than the sum of its parts.” Explains which of the following?
- Emergent Properties
- Interactions between biotic and abiotic components
- Life uses energy and raw materials to grow
- None of these
Which statement about evolution is FALSE?
- Natural selection acts on genetic differences within a population to cause evolution. Individuals do not evolve.
- Natural selection is about slow but steady progress. Through it, populations constantly get better-adapted. When this process is completed for all populations, evolution will come to a stop.
- Evolution occurs constantly, without end; there is no endpoint in evolution.
- According to evolutionary theory, you are related to a bacterium, to a yeast cell, to a snake, and to a whale. In fact, you are related to every species now alive on Earth, and to fossil species like dinosaurs as well.
Imagine you have a peanut butter sandwich in front of you. The sandwich is an example of _______.
The ability or tendency of organisms and cells to maintain stable internal conditions is called
- emergent property
Which best expresses how nutrients and energy move through life?
- Nutrients cycle among all life forms. Energy flows from sunlight to chemical energy to heat.
- Nutrients flow from sunlight to organic matter to heat. Energy cycles among all life forms.
- Nutrients and energy both are continually recycled in a great circle of life.
Which type of molecule best illustrates the very strong relationship between structure and function in biology?
- all kinds of organic matter
- oxygen gas
Why do organisms maintain fairly steady conditions within their cells and bodies?
- Unstable conditions will destroy the DNA in cells; this is the most important risk for a cell facing physical or chemical stress.
- They must maintain stable conditions to keep their enzymes working and generally to enable the chemical reactions of life.
- They need to keep conditions stable so that they can obtain food.
- Organisms just change along with whatever is happening in the outside world, which is usually quite steady.
One organism gets larger as it passes through its life cycle. This is an example of __________.
Which of the following is not a recurring theme in biology?
- Living organisms maintain homeostasis.
- Energy flows through living systems while matter is recycled.
- Evolutionary processes explain both the unity and adaptive diversity of life.
- All of these are recurring themes.
Select the statements that correctly represent the theory of evolution. Select all that apply.
- Evolution is partly about inheritance. Evidence of evolution is seen in structures such as wisdom teeth and the tail bone in humans. These structures are thought to be “left over” from our ancestors and no longer appear to have any essential function in modern humans.
- Natural selection means that today’s organisms are perfectly adapted after millions of years of fine-tuning. No further changes are necessary because of all the progress that has been made by natural selection.
- We can see evidence of past natural selection in adaptations such as the camouflage of moths perched on the bark of their host tree. We can also see natural selection at work today if we track how populations change in rapidly changing environments.
- The theory of evolution does not apply to life today. It is strictly about the history of life: what happened in the past as seen in fossils.
- Scientists disagree about the main ideas of evolutionary theory because of incomplete or conflicting evidence.
An organism or cell exhibits ____________ when it maintains steady internal conditions despite changes in the outer environment.
- natural selection