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Which statement is true of biodiversity hot spots?

◯ A. They withstand high numbers of volcanic eruptions

◯ B. They withstand high temperatures year round.

◯ C. They are rich and threatened reservoirs of life.

◯ D. They cover more than 70% of Earth's surface. 

 

 

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Related questions

Experimental Review

Below are five hypothetical experimental designs. Your job as a reviewer is to pick one of the experiments and write a detailed summary of what is wrong with the proposed study.

Your review should use vocabulary words that have been discussed in class and address the following questions.

Is the study feasible? Will it actually be possible to conduct the proposed study in a controlled manner that produces meaningful data? If there is more than one variable changing simultaneously, no controls, or no replication, then the study is unlikely to produce meaningful data. If there is no way to monitor an experiment in the environment, or no way to conduct the experiment in a controlled environment, like a laboratory, then the experiment is unlikely feasible.

Can you tell from the text if the experiment is designed to be conducted by performing treatments, or by analyzing observational data about a species and its habitat?

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Could you graph the results of this experiment? If so, how would you do it? A column chart to show treatments and controls? A scatter plot or a line graph to look at how changes in the independent variable affect the dependent variable?

Create a post on the discussion board by clicking on "Click to Launch" above.

1. Experiments to Review

1. Climate Change Effects on Marine Iguana Mortality

Hypothesis: If the water temperature in the Galapagos Islands changed from being hot (around 77 degrees) to cold (under 70 degrees), then the mortality rate of Marine Iguanas will increase.

Variables: The independent variable is the temperature of the water that the Marine Iguanas live in. The dependent variable is the mortality rate of the Marine Iguanas. The mortality rate of the Marine Iguanas at the average water temperatures of their habitat.

Experimental Treatments: Iguana Group 1 will be water temperatures and marine iguana mortality rates before 1998. Iguana Group 2 will be water temperatures marine iguana mortality rates after 1998

Prediction:By comparting the average water temperatures with the mortality rates every year before the sudden drop in the iguana population and after a trend will be able to be seen. If the water temperature is truly to blame for the mortality rate increase the water temperature will decrease as the population of Iguanas decreases. The control group is intended to show the average number of Iguanas that die due to other causes.

2. Volcanic Ash Impacts Marine Iguana Longevity

Hypothesis: There are several volcanoes between both the Isabela, and Femandina islands which make this the obvious culprit for the extreme rise in mortality in Marine Iguanas.

Variables: The independent variable is the number of volcanic eruptions per year. The dependent variables are the change in pH of the water in the marine iguanas’ habitat, and the mortality rate of the iguanas.

Experimental Treatments: Iguana Group 1 will live on an island with multiple volcanic eruptions each year. Iguana Group 2 will live on an island with no volcanic eruptions.

Prediction: The group of iguanas living on the island with no eruptions will have longer life spans because the pH of the water will not be altered by the large number of volcanic eruptions.

1. In which of Baumrind's dimensions do parents vary in standards for responsibility and self-control in their children?

A. strategoes for discipline

B. expectations for academic achievement

C. expectations for maturity

D. expressions for maturity

2. Which of the following is true regarding permissive parents ?

A. they show their children little warmth

B. They have high nurturance and acceptance

C. They have high expectations for maturity

D. They are uninvolved in their children's daily life

Are my answers to the following correct?

True, False, True, C and A,B,D

1. Species accumuation are used to estimate local, or alpha,diversity.

2. The shape of a species accumulation curve depends, in part,on the order in which sampes are processed.

3. Species accumulation curves are not needed when a completecensus is available.

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a. Beta diversity measures how quickly species compositionchanges across the landscape

b. There are a variety of different ways researchers havemeasured beta diversity

c. Relatively flat, homogeneous habitats tend to have higherbeta diversity

d. Beta diversity changes depending on the scale at which youmeasure it

5. Paul Ehrlich and E.O. Wilson offered a number of reasons toprotect biodiversity. What were they?

a. Earth cannot "survive" antoher mass extinction event

b. People have an aesthetic and moral obligation to protectEarth's species

c. Earth's biodiversity may provide us with important newresources in the future

d. Loss of biodiversity may reduce ecosystem services that wouldbe difficult to replace

False, False, True, True, Sahara dessert, Secular migration andSweetstakes route

6. Immigration rates decline as the size of an islandincrease.

7. Extinction rates decline as the number of species on anisland increases.

8. Extinction rates increase as the size of an islanddecreases.

9. All else being equal, turnover rates are higher on smallislands than on large ones.

10. When we think of islands, we often think of them as landmasses surrounded by water. Ecologists have suggested a muchbroader definition of an island. Which of the following would NOTbe viewed as an island by an ecologist?

a. Mountain top habitats

b. Urban parks

c. Caves

d. Sahara desert

11. Horses originated in North America and then migrates to Asiaand Europe. As they migrates, they evolved over many generationsinto the horse species we see today. This is an example of whichmigration type?

a. Diffusion

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