Answer the following question given this paragraph: called growth factors signal some cells at the edge of the ectoderm to become epidermis cells. The remaining cells in the center form the neural plate. If the signaling by growth factors were disrupted, then the entire ectoderm would differentiate into neural tissue. The neural plate undergoes a series of cell movements where it rolls up and forms a tube called the neural tube, as illustrated in Figure 43.28. In further development, the neural tube will give rise to the brain and the spinal cord. Q: The neural plate undergoes a series of cell movements where it rolls up and forms a tube called what? Choices: - cell tube - occular tube - peripheral tube - neural tube A:
neural tube
Answer the following question given this paragraph: Did you ever watch a relay race? After the first runner races, he or she passes the baton to the next runner, who takes over. Neurons are a little like relay runners. Instead of a baton, they pass neurotransmitters to the next neuron. Examples of neurotransmitters are chemicals such as serotonin, dopamine, and adrenaline. Q: What do neurons pass to the next neuron? Choices: - contaminants - blood - receptors - neurotransmitters A:
neurotransmitters
Q: Answer the following question given this paragraph: 21.2 | Threats to Biodiversity By the end of this section, you will be able to: Identify significant threats to biodiversity Explain the effects of habitat loss, exotic species, and hunting on biodiversity Identify the early and predicted effects of climate change on biodiversity The core threat to biodiversity on the planet, and therefore a threat to human welfare, is the combination of human population growth and the resources used by that population. The human population requires resources to survive and grow, and those resources are being removed unsustainably from the environment. The three greatest proximate threats to biodiversity are habitat loss, overharvesting, and introduction of exotic species. The first two of these are a direct result of human population growth and resource use. The third results from increased mobility and trade. A fourth major cause of extinction, anthropogenic (human-caused) climate change, has not yet had a large impact, but it is predicted to become significant during this century. Global climate change is also a consequence of human population needs for energy and the use of fossil fuels to meet those needs (Figure 21.7). Environmental issues, such as toxic pollution, have specific targeted effects on species, but are not generally seen as threats at the magnitude of the others. Q: The three greatest proximate threats to biodiversity are habitat loss, overharvesting, and introduction of what? Choices: - solar radiation - carbon dioxide - carbon monoxide - exotic species A:
A: exotic species
Question: Answer the following question given this paragraph: Beginning with Mendel's pea plants, genetics has become one of the most important fields of biology. Genetics discusses genetics, from Mendel's pea plants to current ethical issues associated with this field. The completion of The Human Genome Project is one of the landmark scientific events of the last 50 years. Human genetics affects many, if not every, field of medicine. Technologies associated with genetics are involved in developing products to make our lives better, but have raised a number of ethical, legal and social issues. Q: What is the name of the project concerning genetics that is one of the landmark scientific events of the last 50 years? Choices: - human organism project - manhattan project - blue beam project - human genome project A:
Answer: human genome project
*Question*
Answer the following question given this paragraph: Figure 11.31 Bronchial tubes in the lungs branch into ever-smaller structures, finally ending in alveoli. The alveoli act like tiny bubbles. The surface tension of their mucous lining aids in exhalation and can prevent inhalation if too great. Q: Bronchial tubes in the lungs branch into ever-smaller structures, finally ending in alveoli. the alveoli act like what? Choices: - filters - springs - bellows - tiny bubbles A:
**Answer**
tiny bubbles
(Q).
Answer the following question given this paragraph: Does everyone who smokes develop lung cancer? No, of course not. Is it possible to get lung cancer without smoking? Sadly, yes it is. That's not to say there is no relationship between the two: smoking is still the leading cause of lung cancer. But it does suggest that a person's genetic background has a role in this process. Apart form true single gene disorders, environmental factors, or environmental triggers , may determine the development of disease in individuals genetically predisposed to a particular condition. Environmental triggers may include stress, physical and mental abuse, diet, exposure to toxins, pathogens, and radiation. Many cancers are thought to have an environmental component. It has been suggested that environmental factors play a role in autism as well. Asthma is obviously triggered under certain environmental conditions. Q: Many cancers, as well as autism, are thought to have what component, which is certainly a factor in asthma? Choices: - emotional - critical - ecological - environmental A:
(A).
environmental