Nimbus clouds generally have______and a shapeless appearance. an uniformly dark color uniformly the dark color a uniformly dark color uniformly dark in color

Over Ahalf of all mammal species Bare rodents, and Cthe nearly three thousand species of rodents form Da largest mammalian order.

The Columbia River begins in Athe high meadows of Bwestern Canada, flows through Cthe mountains, and then joins DSnake River in Washington.

Many of Agreatest floods occur when Bexcessive rain falls over Criver basins that are already saturated because of previous Dwet periods.

There is Aan evidence that the formation of life is not Ban accident but a process that takes place whenever Ca planet exists under Dthe right conditions.

When the first gummed postage stamp was introduced, some people called______a “lick-and-stick.“ stamps their stamps stamp this stamp

The first writing ink was made from a pigment found in______. ink sac of octopus the ink sac of the octopus an ink sac of octopus this ink sac of an octopus

After Aplow was introduced in Bthe Middle East, it freed Csome people from having to grow Dtheir food.

If Aan astronomer looks at Bstar that is Cone hundred light years away, Dthe light that can be seen is one hundred years old.

Individuals purchase a lot of technology for the home because______has become so inexpensive. of electronic equipment the equipment’s electronic an electronic equipment electronic equipment

Identical twins have______blood types, eye and skin colors, and fingerprints. identical an identical the identical that identical

TOEFL iBT Speaking. In this integrated speaking task, you will read a short passage, listen to a lecture on the same topic, and then speak in response to a question about what you have read and heard. Do not look at the question until the lecture has ended. Do not look at the reading passage while you are speaking. Reading Time - 45 seconds Mutualism Mutualism is a biological interaction in which two different species live together as partners. Both species benefit in a mutualistic relationship. For example, both may experience increased survival and reproductive success. Mutualism plays a key role in ecology and evolutionary biology. Mutualistic relationships require the evolution of adaptations in both species because changes in either species are likely to affect the survival and reproduction of the other. Mutualism can be contrasted with competition, which has a negative effect on both species, and exploitation, in which one species benefits at the expense of the other. Now cover the passage and listen to the lecture. You may take notes, and you may use your notes to help you answer the question. After you hear the question, begin preparing your response. You may look at the question, but NOT at the passage. You have 30 seconds to prepare your response and 60 seconds to speak. The professor describes the relationship between the acacia tree and the stinging ant. Explain how their interaction is an example of mutualism. Stop Preparation Time - 30 seconds Response Time - 60 secondsNow listen to part of a lecture on this topic in a biology class. Mutualism is an interaction between two species, in which both species receive a benefit, such as a higher rate of survival. The relationship between the acacia tree and the stinging ant is mutualistic in this way. The acacia tree has hollow thorns that provide a place for the ants to live. The tree also provides food for the ants. The tree has swollen glands that produce a sugary solution, and the ants feed on this sugar. There are also small structures that grow on the tips of the tree’s leaves. These small structures are rich in protein. The ants bite those off and eat them too. So, the ants get sugar and protein from the acacia tree. And what does the acacia tree get in return? Well, for one thing, it gets protection. Remember that these are stinging ants. They attack anything that touches the tree. They sting other insects and chase off plant-eating animals. They also destroy all plants that try to compete with the acacia for sunlight, by clipping all vegetation that happens to grow close to the acacia. It’s an arrangement that’s mutually beneficial. The acacia tree feeds and houses the ants, and in return, the ants protect the tree from harmful influences. The professor describes the relationship between the acacia tree and the stinging ant. Explain how their interaction is an example of mutualism.

AMost retailers now use Bthe computers for Cmaking sales presentations in Dstores.

Issues surrounding Athe distribution of Bincome are among Cmost controversial in Deconomics.

AHuman blood has Ba chemical composition similar to Ca seawater from which our Dancestors first emerged.

Sometimes Aan English word is derived from Ban association with Ca place; for example, the kind of Dthe cheese we know as cheddar originated in Cheddar, England.

Some engineers prefer having______. outdoor job a outdoor job an outdoor job the outdoor job

Nimbus clouds generally have______and a shapeless appearance. an uniformly dark color uniformly the dark color a uniformly dark color uniformly dark in color

The Altamira cave paintings show several animals and some men in the act of______. the hunting a hunting hunting an hunting

Edgar Varese was______major composers to embrace the possibilities of electronic music. first one of the first the first first one of