Answer the following question given this paragraph: After implantation occurs, the blastocyst is called an embryo . The embryonic stage lasts through the eighth week following fertilization. During this time, the embryo grows in size and becomes more complex. It develops specialized cells and tissues and starts to form most organs. For an interactive animation of embryonic development, go to this link: http://health. howstuffworks. com/adam-200129. htm . Q: What is the blastocyst called after implantation? Choices: - trophoblast - an nucleus - an produce - an embryo A:
an embryo
(Question)
Answer the following question given this paragraph: Q: The process of photosynthesis ultimately gets powered by what kind of energy? Choices: - biofuel - electricity - nonrenewable energy - light A:
(Answer)
light
Ques: Answer the following question given this paragraph: Figure 9.11 The ends of linear chromosomes are maintained by the action of the telomerase enzyme. Q: The ends of linear chromosomes are maintained by the action of which enzyme? Choices: - cytokine - pepsin - insulin - telomerase A:
Ans: telomerase
(Q).
Answer the following question given this paragraph: We can think about soil as a living resource. Soil is an ecosystem all by itself! Soil is a complex mixture of different materials. Some of them are inorganic . Inorganic materials are made from non-living substances like pebbles and sand. Soil also contains bits of organic materials from plants and animals. In general, about half of the soil is made of pieces of rock and minerals. The other half is organic materials. In the spaces of soil are millions of living organisms. These include earthworms, ants, bacteria, and fungi. In some soils, the organic portion is entirely missing. This is true of desert sand. At the other extreme, a soil may be completely organic. Peat, found in a bog or swamp, is totally organic soil. Organic materials are necessary for a soil to be fertile. The organic portion provides the nutrients needed for strong plant growth. Q: How much of the soil is made of pieces of rock and minerals? Choices: - three fourth - one third - two third - about half A:
(A).
about half
Ques:Answer the following question given this paragraph: Common skin problems include acne and skin cancer. Q: Acne and different types of cancer can affect what large organ? Choices: - liver - lungs - brain - skin A:

Ans:skin
Ques:Answer the following question given this paragraph: All of these animal behaviors are important. They help the animals get food for energy, make sure their young survive, or ensure that they, themselves, survive. Behaviors that help animals or their young survive, increase the animals' fitness. Animals with higher fitness have a better chance of passing their genes on to the next generation. If genes control behaviors that increase fitness, the behaviors become more common in the species. This occurs through the process of evolution by natural selection. Q: Fitness and natural selection are parts of what theory that might describe how organisms change over time? Choices: - dessication - gravity - implementation - evolution A:

Ans:
evolution