Answer the following question given this paragraph: 28.5 Red algae and green algae are the closest relatives of land plants. Q: Red algae and green algae are the closest relatives of what? Choices: - transfer plants - arctic plants - water plants - land plants A:
land plants
(Question)
Answer the following question given this paragraph: What's at the bottom of the food chain? A bit of the food energy comes from above, where plankton photosynthesize. Most comes from the coral. Coral are animals that live with tiny zooxanthellae that also photosynthesize. Of course, you know what's at the top of this food chain!. Q: What are animals that live with tiny zooxanthellae that also photosynthesize? Choices: - worms - bacteria - fungi - coral A:
(Answer)
coral
Ques: Answer the following question given this paragraph: Whether or not a given isotope is radioactive is a characteristic of that particular isotope. Some isotopes are stable indefinitely, while others are radioactive and decay through a characteristic form of emission. As time passes, less and less of the radioactive isotope will be present, and the level of radioactivity decreases. An interesting and useful aspect of radioactive decay is half-life, which is the amount of time it takes for one-half of a radioactive isotope to decay. The half-life of a specific radioactive isotope is constant; it is unaffected by conditions and is independent of the initial amount of that isotope. Consider the following example. Suppose we have 100.0 g of tritium (a radioactive isotope of hydrogen). It has a half-life of 12.3 y. After 12.3 y, half of the sample will have decayed from hydrogen-3 to helium-3 by emitting a beta particle, so that only 50.0 g of the original tritium remains. After another 12.3 y making a total of 24.6 yanother half of the remaining tritium will have decayed, leaving 25.0 g of tritium. After another 12.3 ynow a total of 36.9 yanother half of the remaining tritium will have decayed, leaving 12.5 g. This sequence of events is illustrated in Figure 15.1 "Radioactive Decay". Figure 15.1 Radioactive Decay. Q: Some isotopes are stable indefinitely, while others are radioactive and do what through a characteristic form of emission? Choices: - replicate - bond - expand - decay A:
Ans: decay
(Q).
Answer the following question given this paragraph: Blood from the body enters the right atrium of the heart. The right atrium pumps the blood to the right ventricle, which pumps it to the lungs. This loop is represented by the blue arrows in Figure above . Q: Blood from the body enters what chamber of the heart before it is pumped to the right ventricle and then to the lungs? Choices: - left ventricle - left bivalve - left atrium - right atrium A:
(A).
right atrium
Ques:Answer the following question given this paragraph: Later, a true coelom evolved. This is a fluid-filled body cavity that is completely enclosed by mesoderm. The coelom lies between the digestive cavity and body wall. You can see it in the invertebrate in Figure below . Modern invertebrates with a coelom include mollusks (Phylum Mollusca) and annelids (Phylum Annelida). Q: What is a fluid-filled body cavity that is completely enclosed by mesoderm called? Choices: - pseudocoelom - hymenium - choroid - coelom A:

Ans:coelom
Question: Answer the following question given this paragraph: Another barrier is the saliva in the mouth, which is rich in lysozymean enzyme that destroys bacteria by digesting their cell walls. The acidic environment of the stomach, which is fatal to many pathogens, is also a barrier. Additionally, the mucus layer of the gastrointestinal tract, respiratory tract, reproductive tract, eyes, ears, and nose traps both microbes and debris, and facilitates their removal. In the case of the upper respiratory tract, ciliated epithelial cells move potentially contaminated mucus upwards to the mouth, where it is then swallowed into the digestive tract, ending up in the harsh acidic environment of the stomach. Considering how often you breathe compared to how often you eat or perform other activities that expose you to pathogens, it is not surprising that multiple barrier mechanisms have evolved to work in concert to protect this vital area. Q: How does lysozyme destroy bacteria? Choices: - by antibiotic use - by eating them - by paralyzing them - by digesting their cell walls A:
Answer:
by digesting their cell walls