Q: In a chemical reaction, what, in general, comes together in order to form a product? Read this paragraph and choose the correct option from the provided answers: Bonds break and reform during chemical reactions. Reactants and products contain the same atoms, but they are rearranged during the reaction, so reactants and products are different substances. Choices: - gases - liquids - propellants - reactants A:
reactants

(Question)
Q: What do you call a substance that cannot be separated into smaller pieces, which is also defined by the number of protons it has? Read this paragraph and choose the correct option from the provided answers: element: A substance that cannot be separated into smaller pieces. Defined by how many protons it has. Choices: - electrol - molecule - atom - element A:
(Answer)
element

Ques: Q: What returns blood from capillaries to an atrium? Read this paragraph and choose the correct option from the provided answers: Choices: - the lymph system - arteries - the liver - veins A:
Ans: veins

(Q).
Q: What effect does tamiflu have on viruses and cells? Read this paragraph and choose the correct option from the provided answers: an enzyme (viral neuraminidase) that allows new virions to leave their infected cells. Thus, Tamiflu inhibits the spread of virus from infected to uninfected cells. Other antiviral drugs, such as Ribavirin, have been used to treat a variety of viral infections, although its mechanism of action against certain viruses remains unclear. Choices: - destroys all viruses - reprograms viruses - enhances cells - inhibits spread of virus A:
(A).
inhibits spread of virus

Ques:Q: When resources become limiting, populations follow a logistic growth curve in which the size will level off at a point called what? Read this paragraph and choose the correct option from the provided answers: 19.2 Population Growth and Regulation Populations with unlimited resources grow exponentiallywith an accelerating growth rate. When resources become limiting, populations follow a logistic growth curve in which population size will level off at the carrying capacity. Populations are regulated by a variety of density-dependent and density-independent factors. Life-history characteristics, such as age at first reproduction or numbers of offspring, are characteristics that evolve in populations just as anatomy or behavior can evolve over time. The model of r- and K-selection suggests that characters, and possibly suites of characters, may evolve adaptations to population stability near the carrying capacity (K-selection) or rapid population growth and collapse (r-selection). Species will exhibit adaptations somewhere on a continuum between these two extremes. Choices: - believed capacity - full capacity - containing capacity - carrying capacity A:

Ans:carrying capacity

Question: Q: What is the basic unit of an organism called? Read this paragraph and choose the correct option from the provided answers: While cells are the basic units of an organism, groups of cells can perform a job together. These cells are called specialized because they have a special job. Specialized cells can be organized into tissues . For example, your liver cells are organized into liver tissue. Your liver tissue is further organized into an organ, your liver. Organs are formed from two or more specialized tissues working together to perform a job. All organs, from your heart to your liver, are made up of an organized group of tissues. Choices: - electron - singularity - particle - cell A:
Answer:
cell