bio 13

24問 • 11ヶ月前

問題一覧

Two facts about cells are: Fact 1: If the parent cell is haploid (n), the daughter cells will also be haploid. If the parent cell is diploid (2n), the daughter cells will also be diploid. Fact 2: Single parent diploid (2n) cell produces four haploid (n) daughter cells. Which of these CORRECTLY identifies the two facts?

Fact 1: mitosis, Fact 2: meiosis

Solution A: Egg swells to about twice its original size. Solution B: Egg absorbs bright green color, but remains original size. Solution C: Egg shrivels to about half of its original size. Solution D: Egg remains largely unchanged. A typical egg contains about 2% dissolved solids. Douglas places de-shelled eggs in four unknown solutions provided by his biology teacher. Based on this fact, predict which solution contains 10% saltwater, from the observations of the egg.

Solution C

Which example represents a DISADVANTAGE of asexual reproduction?

A single antibiotic is able to quickly and easily kill millions of genetically identical bacteria.

What is the BEST conclusion that can be drawn? I. All the energy contained within the organisms in the web originated from the sun. II. The energy from the caterpillar is transferred to the plant. III. The hawk is the top predator. IV. Energy is transferred from organism to organism in this food web.

I, III, and IV only

In general, which trophic level has the LEAST energy available to it?

Tertiary Consumer

What does this tell you about the energy in this ecosystem?

Energy decreases from bottom to top because some is used at each level for life processes.

In a marine ecosystem, a decrease in secondary consumers could cause a decrease in primary producers. What would best explain the decrease in primary producers?

An increase in the population of primary consumers

Drought in an ecosystem results in decreased populations of primary consumers. What would best explain the decrease in primary consumers?

A decrease in primary producers

A tundra food web is shown. What would most likely happen if the lemming population significantly decreased?

The ermine population would decrease.

In the graph, the density-independent limiting factor is most likely

Tornado

If the producers begin with 100,000 kCal of energy, how much energy with the secondary consumers have to utilize?

1000 kCal

Which graph shows the exponential growth of a population?

Coat color in dogs is controlled in part by a gene that regulates the deposition of pigment. The patches of color in the dog shown in the figure are caused by a somatic mutation. The genotypes in the different patches are indicated. Which statements is NOT true about the mutation that caused the black coloring?

The mutation was present in the gametes of the dog’s parents.

Detached earlobes are dominant. A father has one allele for detached earlobes and one allele for attached earlobes. What is the probability that he produces a gamete with the allele for attached earlobes?

50%

An algae species that typically lives in 0.6% salinity is placed in a hypertonic solution. Which of the following is true?

the solution contains 0.8% salt and the algae will lose water

The illustration below shows an ecosystem in the Southern Plains. How would a drought in the Southern Plains most likely affect the quail population?

A decrease in the quail population due to a decrease in nesting cover

Coral reefs are important to many ocean ecosystems because they provide food and shelter for numerous marine organisms. Climate changes that lead to increased water temperatures can slow the growth of coral. Scientists monitor the physical conditions and species distribution of coral reefs and try to temporarily alter conditions when they are harmful to coral reefs. Which of these actions by scientists would best accomplish the goal of preserving coral reefs?

Protect the biodiversity of coral reefs

White-tailed deer prefer to live in wooded areas. Their diet consists of grasses, shrubs, and other small forage plants. White-tailed deer are prey to animals such as coyotes, bobcats, and wolves. These deer are also the most important hosts for a parasite, the deer tick, and are critical for deer tick survival. Larvae of the deer tick feed on birds and smaller mammals. How would the carrying capacity of other organisms in the ecosystem change if the white-tailed deer population decreased?

The carrying capacity of adult deer ticks would decrease.

Habitat destruction is the leading cause for declining populations of species on our planet. Due to human development, industry, and forestry, humans are destroying the habitat of many species at an alarming rate. Consider the bald eagle. The bald eagle population was threatened in the late 60s and early 70s. Thanks to an aggressive bald eagle protection program, bald eagle breeding pairs in the wild have soared as seen in the population graph below. The bald eagle's population very nearly reached extinction. Why did the bald eagle's declining population make it more vulnerable to extinction?

As populations decline, there is less genetic diversity.

The diagrams below represent the species present in two different ecosystems Which ecosystem has the greatest ability to recover from a natural disturbance to its natural state and why?

Ecosystem II, because greater biodiversity results in higher fitness among all species

A species of protozoan-carrying mosquito lives in a meadow. The protozoan, if transmitted to mammals hosts through a bite, can be fatal to the host. Two species of rabbits, species I and II, both live in this meadow. Species I is immune to the protozoan but species II is not. The mosquito is a main food source for a bat species that lives around the meadow. If all of these bats are eliminated suddenly what would be the most likely outcome?

Increased mortality of rabbit species II

Notice in the image of the plant that both oxygen and carbon dioxide enter and exit the plant. Using what you know about photosynthesis and cellular respiration, explain what is happening with regard to these two gases.

Plants require carbon dioxide for photosynthesis and produce oxygen as a byproduct. Plants then use the oxygen released in cellular respiration, producing carbon dioxide as a byproduct.

Two energy conversion processes that occur in typical cells are shown here. Compare the two processes. Which description BEST compares the energy conversions in the processes shown?

Equation 1 is illustrating photosynthesis as solar energy is being used to convert inorganic compounds into organic compounds.

The enzyme amylase begins reacting with starch during the chewing of food. When the food enters the stomach, amylase is no longer active and starch decomposition stops. When the food leaves the stomach and enters the small intestine, starch decomposition continues. Why is amylase inactive in the stomach?

The pH of the stomach is not optimum for amylase.

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問題一覧

Fact 1: mitosis, Fact 2: meiosis

Solution C

Which example represents a DISADVANTAGE of asexual reproduction?

A single antibiotic is able to quickly and easily kill millions of genetically identical bacteria.

I, III, and IV only

In general, which trophic level has the LEAST energy available to it?

Tertiary Consumer

What does this tell you about the energy in this ecosystem?

Energy decreases from bottom to top because some is used at each level for life processes.

In a marine ecosystem, a decrease in secondary consumers could cause a decrease in primary producers. What would best explain the decrease in primary producers?

An increase in the population of primary consumers

Drought in an ecosystem results in decreased populations of primary consumers. What would best explain the decrease in primary consumers?

A decrease in primary producers

A tundra food web is shown. What would most likely happen if the lemming population significantly decreased?

The ermine population would decrease.

In the graph, the density-independent limiting factor is most likely

Tornado

If the producers begin with 100,000 kCal of energy, how much energy with the secondary consumers have to utilize?

1000 kCal

Which graph shows the exponential growth of a population?

The mutation was present in the gametes of the dog’s parents.

50%

An algae species that typically lives in 0.6% salinity is placed in a hypertonic solution. Which of the following is true?

the solution contains 0.8% salt and the algae will lose water

The illustration below shows an ecosystem in the Southern Plains. How would a drought in the Southern Plains most likely affect the quail population?

A decrease in the quail population due to a decrease in nesting cover

Protect the biodiversity of coral reefs

The carrying capacity of adult deer ticks would decrease.

As populations decline, there is less genetic diversity.

The diagrams below represent the species present in two different ecosystems Which ecosystem has the greatest ability to recover from a natural disturbance to its natural state and why?

Ecosystem II, because greater biodiversity results in higher fitness among all species

Increased mortality of rabbit species II

Plants require carbon dioxide for photosynthesis and produce oxygen as a byproduct. Plants then use the oxygen released in cellular respiration, producing carbon dioxide as a byproduct.

Two energy conversion processes that occur in typical cells are shown here. Compare the two processes. Which description BEST compares the energy conversions in the processes shown?

Equation 1 is illustrating photosynthesis as solar energy is being used to convert inorganic compounds into organic compounds.

The pH of the stomach is not optimum for amylase.