Ques:Q: What is it called when organisms with traits that better enable them to adapt to their environment tend to survive and reproduce in greater numbers? Read this paragraph and choose the correct option from the provided answers: New species develop naturally through the process of natural selection . Due to natural selection, organisms with traits that better enable them to adapt to their environment will tend to survive and reproduce in greater numbers. Natural selection causes beneficial heritable traits to become more common in a population and unfavorable heritable traits to become less common. For example, a giraffe's neck is beneficial because it allows the giraffe to reach leaves high in trees. Natural selection caused this beneficial trait to become more common than short necks. Choices: - natural distribution - adaptation - evolution - natural selection A:

Ans:natural selection
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Ques:Q: What is the year cycle that sunspots occur? Read this paragraph and choose the correct option from the provided answers: The most noticeable magnetic activity of the Sun is the appearance of sunspots. Sunspots are cooler, darker areas on the Sun's surface ( Figure below ). Sunspots occur in an 11-year cycle. The number of sunspots begins at a minimum. The number gradually increases to the maximum. Then the number returns to a minimum again. Choices: - 12 - 15 - 22 - 11 A:

Ans:11
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Ques:Q: The sporophyte phase is the longest phase in the life of what? Read this paragraph and choose the correct option from the provided answers: Figure 26.8 illustrates the life cycle of a conifer. The sporophyte (2n) phase is the longest phase in the life of a gymnosperm. The gametophytes (1n)microspores and megasporesare reduced in size. It may take more than year between pollination and fertilization while the pollen tube grows towards the megasporocyte (2n), which undergoes meiosis into megaspores. The megaspores will mature into eggs (1n). Choices: - echinoderm - arthropod - angiosperm - gymnosperm A:

Ans:gymnosperm
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Ques:Q: What effect in the atmosphere ensures that the earth maintains the correct temperature to support life? Read this paragraph and choose the correct option from the provided answers: When sunlight heats Earth's surface, some of the heat radiates back into the atmosphere. Some of this heat is absorbed by gases in the atmosphere. This is the greenhouse effect , and it helps to keep Earth warm. The greenhouse effect allows Earth to have temperatures that can support life. Choices: - coriolis effect - ozone effect - smog effect - greenhouse effect A:

Ans:
greenhouse effect
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