Problem: OPTIONS:
- protists
- spirogyra
- trichina
- ecdysozoa
Q: Answer the following question given this paragraph: Figure 27.13 Animals that molt their exoskeletons, such as these (a) Madagascar hissing cockroaches, are in the clade Ecdysozoa. (b) Phoronids are in the clade Lophotrochozoa. The tentacles are part of a feeding structure called a lophophore. (credit a: modification of work by Whitney Cranshaw, Colorado State University, Bugwood. org; credit b: modification of work by NOAA). Q: Animals that molt their exoskeletons belong to which clade? A:
Answer: ecdysozoa

Problem:OPTIONS:
- galaxies
- inside nuclei
- inside protons
- orbits

Answer the following question given this paragraph: Electrons can occupy only certain regions of space, called orbits. Q: What are the only regions of space that electrons can occupy? A:
****
A: orbits

Answer the following question given this paragraph: 7.4 The Thoracic Cage The thoracic cage protects the heart and lungs. It is composed of 12 pairs of ribs with their costal cartilages and the sternum. The ribs are anchored posteriorly to the 12 thoracic vertebrae. The sternum consists of the manubrium, body, and xiphoid process. The manubrium and body are joined at the sternal angle, which is also the site for attachment of the second ribs. Ribs are flattened, curved bones and are numbered 112. Posteriorly, the head of the rib articulates with the costal facets located on the bodies of thoracic vertebrae and the rib tubercle articulates with the facet located on the vertebral transverse process. The angle of the ribs forms the most posterior portion of the thoracic cage. The costal groove in the inferior margin of each rib carries blood vessels and a nerve. Anteriorly, each rib ends in a costal cartilage. True ribs (17) attach directly to the sternum via their costal cartilage. The false ribs (812) either attach to the sternum indirectly or not at all. Ribs 810 have their costal cartilages attached to the cartilage of the next higher rib. The floating ribs (1112) are short and do not attach to the sternum or to another rib. Q: What cage composed of 12 pairs of ribs, with their costal cartilages and the sternum, protects the heart and lungs? A:
OPTIONS:
- sacral
- lumbar
- cervical
- thoracic
thoracic

Answer the following question given this paragraph: The water Americans get from their faucets is safe. This water has been treated and purified. At least 20% of the world's people do not have clean drinking water always available. That's more than 1 billion people. They must drink water from where they can get it. Maybe straight from a river or pond ( Figure below ). Human wastes may be in the water. If that's the case, the water will probably contain pathogens. Pathogens are organisms that cause diseases. Q: At least 20 percent of the world's people do not have a ready supply of what? A:
OPTIONS:
- clothing
- food
- oil
- clean drinking water

Answer: clean drinking water

Question: Answer the following question given this paragraph: Today, we known that characteristics of organisms are controlled by genes on chromosomes (see Figure below ). The position of a gene on a chromosome is called its locus . In sexually reproducing organisms, each individual has two copies of the same gene, as there are two versions of the same chromosome ( homologous chromosomes ). One copy comes from each parent. The gene for a characteristic may have different versions, but the different versions are always at the same locus. The different versions are called alleles . For example, in pea plants, there is a purple-flower allele ( B ) and a white-flower allele ( b ). Different alleles account for much of the variation in the characteristics of organisms. Q: Locus refers to the position of what on a chromosome, which controls the characteristics of an organism? A:
OPTIONS:
- genome
- gamete
- rna
- gene
Answer: gene

input: OPTIONS:
- large length
- incomplete length
- small length
- unspecified length Now, answer this question: Answer the following question given this paragraph: The general term peptide refers to an amino acid chain of unspecified length. However, chains of about 50 amino acids or more are usually called proteins or polypeptides. In its physiologically active form, a protein may be composed of one or more polypeptide chains. For peptides and proteins to be physiologically active, it is not enough that they incorporate certain amounts of specific amino acids. The order, or sequence, in which the amino acids are connected is also of critical importance. Bradykinin is a nine-amino acid peptide produced in the blood that has the following amino acid sequence: arg-pro-pro-gly-phe-ser-pro-phe-arg This peptide lowers blood pressure, stimulates smooth muscle tissue, increases capillary permeability, and causes pain. When the order of amino acids in bradykinin is reversed, arg-phe-pro-ser-phe-gly-pro-pro-arg the peptide resulting from this synthesis shows none of the activity of bradykinin. Saylor URL: http://www. saylor. org/books. Q: The general term peptide refers to an amino acid chain of what? A:
A:
output:
unspecified length