Q: Q: Unlike the biological species concept, the ecological species concept can accommodate asexual as well as ________ species. Read this paragraph and choose the correct option from the provided answers: Choices: - homosexual - artificial - homologous - sexual A:
A: sexual

Q: Q: What term describes diseases caused by abnormal cells in the body dividing uncontrollably? Read this paragraph and choose the correct option from the provided answers: Diseases One of the most talked about diseases is skin cancer. Cancer is a broad term that describes diseases caused by abnormal cells in the body dividing uncontrollably. Most cancers are identified by the organ or tissue in which the cancer originates. One common form of cancer is skin cancer. The Skin Cancer Foundation reports that one in five Americans will experience some type of skin cancer in their lifetime. The degradation of the ozone layer in the atmosphere and the resulting increase in exposure to UV radiation has contributed to its rise. Overexposure to UV radiation damages DNA, which can lead to the formation of cancerous lesions. Although melanin offers some protection against DNA damage from the sun, often it is not enough. The fact that cancers can also occur on areas of the body that are normally not exposed to UV radiation suggests that there are additional factors that can lead to cancerous lesions. In general, cancers result from an accumulation of DNA mutations. These mutations can result in cell populations that do not die when they should and uncontrolled cell proliferation that leads to tumors. Although many tumors are benign (harmless), some produce cells that can mobilize and establish tumors in other organs of the body; this process is referred to as metastasis. Cancers are characterized by their ability to metastasize. Choices: - eczema - diabetes - radiation - cancer A:
A: cancer

Q: Q: What do aquatic arthropods use to exchange gases with the water? Read this paragraph and choose the correct option from the provided answers: Like mollusks and annelids, aquatic arthropods may have gills to exchange gases with the water (discussed below). Terrestrial arthropods, on the other hand, have special respiratory structures to exchange gases with the air. These are described in Figure below . Choices: - nostrils - pores - lungs - gills A:
A: gills

Q: Q: For a star to form, what force pulls gas and dust into the center of the nebula? Read this paragraph and choose the correct option from the provided answers: For a star to form, gravity pulls gas and dust into the center of the nebula. As the material becomes denser, the pressure and the temperature increase. When the temperature of the center becomes hot enough, nuclear fusion begins. The ball of gas has become a star!. Choices: - weight - centrifugal force - motion - gravity A:
A: gravity