Answer the following question given this paragraph: Unless an animal cell (such as the red blood cell in the top panel) has an adaptation that allows it to alter the osmotic uptake of water, it will lose too much water and shrivel up in a hypertonic environment. If placed in a hypotonic solution, water molecules will enter the cell, causing it to swell and burst. Plant cells (bottom panel) become plasmolyzed in a hypertonic solution, but tend to do best in a hypotonic environment. Water is stored in the central vacuole of the plant cell. Q: What kind of solution might cause animal cells to burst? Choices: - Acid Solution - monatomic - eutrophic - hypotonic A:
hypotonic
Answer the following question given this paragraph: People build dams and levees to protect from flooding. In an emergency, sandbags can be put out. Q: Why do people build dams and levees? Choices: - to horde the water - increase flooding - store drinking water - prevent flooding A:
prevent flooding
Q: Answer the following question given this paragraph: In this equation, the letters A and B represent the reactants that begin the reaction, and the letter C represents the product that is synthesized in the reaction. The arrow shows the direction in which the reaction occurs. Q: What term is used to describe the sequence of elementary steps that together comprise an entire chemical reaction? Choices: - source mechanism - elemental mechanism - potassium mechanism - reaction mechanism A:
A: reaction mechanism
Question: Answer the following question given this paragraph: All living things need energy. You can often see energy at work in living things. Look at the hummingbird and jellyfish in Figure below . Both of them are obviously using energy. Living things constantly use energy in less obvious ways as well. Inside every cell, all living things need energy to carry out life processes. Life runs on chemical energy. Where does this chemical energy come from?. Q: Each cell and every living thing requires what? Choices: - potassium - calcium - salt - energy A:
Answer: energy
*Question*
Answer the following question given this paragraph: RNA, the other nucleic acid. RNA has many important functions, especially during protein synthesis. And what allows it to be involved in protein synthesis is its ability to fold into three-dimensional structures, giving the molecule specific functions. This structure depicts an RNA molecule. the numerous secondary structures, such as the helices, are visible. Q: Rna is especially important during synthesis of what? Choices: - glucose - mitochondria - sulfur - protein A:
**Answer**
protein
(Question)
Answer the following question given this paragraph: Before Darwinian evolution became the prevailing theory of the field, French naturalist Jean-Baptiste Lamarck theorized that acquired traits could, in fact, be inherited; while this hypothesis has largely been unsupported, scientists have recently begun to realize that Lamarck was not completely wrong. Visit this site (http://openstaxcollege. org/l/epigenetic) to learn more. Heritability is the fraction of phenotype variation that can be attributed to genetic differences, or genetic variance, among individuals in a population. The greater the hereditability of a population's phenotypic variation, the more susceptible it is to the evolutionary forces that act on heritable variation. The diversity of alleles and genotypes within a population is called genetic variance. When scientists are involved in the breeding of a species, such as with animals in zoos and nature preserves, they try to increase a population's genetic variance to preserve as much of the phenotypic diversity as they can. This also helps reduce the risks associated with inbreeding, the mating of closely related individuals, which can have the undesirable effect of bringing together deleterious recessive mutations that can cause abnormalities and susceptibility to disease. For example, a disease that is caused by a rare, recessive allele might exist in a population, but it will only manifest itself when an individual carries two copies of the allele. Because the allele is rare in a normal, healthy population with unrestricted habitat, the chance that two carriers will mate is low, and even then, only 25 percent of their offspring will inherit the disease allele from both parents. While it is likely to happen at some point, it will not happen frequently enough for natural selection to be able to swiftly eliminate the allele from the population, and as a result, the allele will be maintained at low levels in the gene pool. However, if a family of carriers begins to interbreed with each other, this will dramatically increase the likelihood of two... Q: The diversity of alleles and genotypes within a population is known as genetic what? Choices: - group - density - variable - variance A:
(Answer)
variance