Can questions 1-10 all be answered please
1. In a beetle species, some individuals have large horns and
others do not. Which of the following is required for
longer horns to evolve via natural selection in
this population? Individuals with longer horns
must____________________.
| a. |
have a shorter generation time than short-horned
individuals. |
| b. |
All of these are required for longer horns to evolve through
natural selection. |
|
c.have more offspring survive to breeding age than short-horned
individuals. |
| d. |
have received more food during their larval period |
2. Which of the following statements is true?
|
a. An organism with high fitness in one environment will have
high fitness in other environments
|
|
b. If natural selection is present, the population will
evolve. |
|
c. Natural selection consistently favors socially dominant
individuals. |
| d. |
Evolution through natural selection tends to increase the
population’s average fitness. |
3. The phylogenetic relationships among modern Eukaryotes
suggest that the first Eukaryote was
4. Unlike marine members of Actinopterygii (ray-finned fish),
members of Chondrichthyes (sharks and rays) maintain their
salt-water balance by
|
a.tolerating high concentrations of urea in their blood and
tissues. |
| b. |
active transport in the gills to retain water |
|
c. tolerating high concentrations of sodium and other ions in
the blood and tissues |
|
d.active transport in the kidneys to excrete salts |
5. Which of the following trends in the human population is
probably NOT an example of recent evolution through natural
selection?
| a. |
People are becoming taller on average. |
|
b. People from tropical regions tend to have much darker skin
than people from higher latitudes. |
|
c. Many people continue to produce lactase as adults. |
6. What physical property probably limits the possible size of
single-celled organisms in the ocean?
|
a.Diffusion is insufficient for gas and nutrient exchange |
|
b. Inability to maintain their temperature in a favorable
range. |
|
c.Osmotic pressure becomes stronger with size, causing them to
shrivel. |
|
d.Inability to maintain their structural integrity. |
7.Plants and algae are almost all photosynthetic. What is the
function of mitochondria in their cells?
|
a.None, photosynthetic organisms do not have mitochondria. |
|
b.Convert light energy into chemical energy |
|
c.Manufacture sugars from ATP |
8. Carbon dioxide is a limiting resource for most aquatic
plants, even though it can reach quite high concentrations in
surface waters. How is that possible?
|
a.
|
Plants prefer to use bicarbonate for photosynthesis, so CO2 is
not used. |
| b. |
Plants deplete the water immediately surrounding their leaves,
creating a low-CO2 boundary layer. |
|
c.Lakes and oceans are too acidic for most aquatic plants to
function. |
|
d.It's bound up in bicarbonate, which plants cannot use. |
9. Many terrestrial mammals weigh much less than a pound, yet
the smallest fully marine mammal is the sea otter, which weighs
over 30 lbs. as an adult. How might the surface area: volume ratio
contribute to the large size of marine mammals?
|
a.Animals with high SA:V ratios retain heat more
efficiently. |
|
b. Animals with low SA:V ratio retain heat more
efficiently. |
|
c. Animals with high SA:V ratios generate more heat via higher
metabolisms. |
|
d. Animals with low SA:V ratio are able to take more prey. |
10.Water has a number of properties that make it easier for
living things to survive in it. Which pair below has an correct
property of water matched with a correct explanation of how it
makes a good environment for life?
|
a. low density: makes movement easier |
|
b. high specific heat: stabilizes the environmental
temperature |
|
c. polar liquid: prevents diffusion of ions |
