Question

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

a.	terrestrial

b.	heterotrophic

c.	photosynthetic

d. multicellular

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

d.Convert sugars to 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

Answer 1

these are the answers according to me of the questions, and the option for these are as follows.

1. option- b
2. option- d
3. option- a
4. option- a
5. option - a
6. option- b
7. option- d