Answer the following question given this paragraph: When an element gains one or more electrons, an anion is formed. Nonmetals typically become anions when they interact with other chemical species. Q: What is formed when an element gains one or more electrons? Choices: - cation - ion - neutron - anion A:
anion
Answer the following question given this paragraph: Q: What are elements required in very small amounts? Choices: - pollutants - minerals - macronutrients - micronutrients A:
micronutrients
Q: Answer the following question given this paragraph: Composition of Blood You have probably had blood drawn from a superficial vein in your arm, which was then sent to a lab for analysis. Some of the most common blood testsfor instance, those measuring lipid or glucose levels in plasmadetermine which substances are present within blood and in what quantities. Other blood tests check for the composition of the blood itself, including the quantities and types of formed elements. One such test, called a hematocrit, measures the percentage of RBCs, clinically known as erythrocytes, in a blood sample. It is performed by spinning the blood sample in a specialized centrifuge, a process that causes the heavier elements suspended within the blood sample to separate from the lightweight, liquid plasma (Figure 18.2). Because the heaviest elements in blood are the erythrocytes, these settle at the very bottom of the hematocrit tube. Located above the erythrocytes is a pale, thin layer composed of the remaining formed elements of blood. These are the WBCs, clinically known as leukocytes, and the platelets, cell fragments also called thrombocytes. This layer is referred to as the buffy coat because of its color; it normally constitutes less than 1 percent of a blood sample. Above the buffy coat is the blood plasma, normally a pale, strawcolored fluid, which constitutes the remainder of the sample. The volume of erythrocytes after centrifugation is also commonly referred to as packed cell volume (PCV). In normal blood, about 45 percent of a sample is erythrocytes. The hematocrit of any one sample can vary significantly, however, about 3650 percent, according to gender and other factors. Normal hematocrit values for females range from 37 to 47, with a mean value of 41; for males, hematocrit ranges from 42 to 52, with a mean of 47. The percentage of other formed elements, the WBCs and platelets, is extremely small so it is not normally considered with the hematocrit. So the mean plasma percentage is the percent of blood that is not erythrocytes: for females, it is... Q: Normal blood is comprised of nearly half erythrocytes, which is another word for what cells? Choices: - monocytes - white blood cells - plateletes - red blood cells A:
A: red blood cells
Question: Answer the following question given this paragraph: Orbital Energies and Atomic Structure The energy of atomic orbitals increases as the principal quantum number, n, increases. In any atom with two or more electrons, the repulsion between the electrons makes energies of subshells with different values of l differ so that the energy of the orbitals increases within a shell in the order s < p < d < f. Figure 6.25 depicts how these two trends in increasing energy relate. The 1s orbital at the bottom of the diagram is the orbital with electrons of lowest energy. The energy increases as we move up to the 2s and then 2p, 3s, and 3p orbitals, showing that the increasing n value has more influence on energy than the increasing l value for small atoms. However, this pattern does not hold for larger atoms. The 3d orbital is higher in energy than the 4s orbital. Such overlaps continue to occur frequently as we move up the chart. Q: How is the energy of an atomic orbital affected as the principal quantum number increases? Choices: - it decreases - It doubles - It triples - it increases A:
Answer: it increases
*Question*
Answer the following question given this paragraph: Gametogenesis may differ between males and females. Male gametes are called sperm . Female gametes are called eggs . In human males, for example, the process that produces mature sperm cells is called spermatogenesis . During this process, sperm cells grow a tail and gain the ability to "swim," like the human sperm cell shown in Figure below . In human females, the process that produces mature eggs is called oogenesis . Just one egg is produced from the four haploid cells that result from meiosis. The single egg is a very large cell, as you can see from the human egg in Figure below . Q: What are the male gametes called? Choices: - cytoplasm - pollen - urea - sperm A:
**Answer**
sperm
(Question)
Answer the following question given this paragraph: Reptiles cold-blooded, or ectothermic, meaning that their heat come from their environment. Sometimes defined as all amniotes that are not birds or mammals. Reptiles can be classified by skull structure into four groups: . Q: What term given to animals like reptiles is a synonym for ectothermic, which means that their heat comes from their environment? Choices: - warm-blooded - hot-blooded - thermal regulating - cold-blooded A:
(Answer)
cold-blooded