Q: Cyanobacteria are bluish green in color because they contain what? Read this paragraph and choose the correct option from the provided answers: Bacteria called cyanobacteria are very important. They are bluish green in color (see Figure below ) because they contain chlorophyll. They make food through photosynthesis and release oxygen into the air. These bacteria were probably responsible for adding oxygen to the air on early Earth. This changed the planet's atmosphere. It also changed the direction of evolution. Ancient cyanobacteria also may have evolved into the chloroplasts of plant cells. Choices: - chloroplasts - microbial - carbonate - chlorophyll A:
chlorophyll

(Question)
Q: What kind of symmetry do echinoderm larvae have? Read this paragraph and choose the correct option from the provided answers: Choices: - internal - radial - spherical - bilateral A:
(Answer)
bilateral

Ques: Q: Historically, malaria has rivaled what as the leading cause of human death by infectious disease? Read this paragraph and choose the correct option from the provided answers: Alloys can be one of two general types. In one type, called a substitutional alloy, the various atoms simply replace each other in the crystal structure. In another type, called an interstitial alloy, the smaller atoms such as carbon fit in between the larger atoms in the crystal packing arrangement. Choices: - heart attack - hepatitis - cancer - tuberculosis A:
Ans: tuberculosis

(Q).
Q: What is the term for the blockage of an artery by the buildup of fatty plaques? Read this paragraph and choose the correct option from the provided answers: make up the middle layer and the bulk of the heart wall. The outer layer of cells is called the epicardium, of which the second layer is a membranous layered structure called the pericardium that surrounds and protects the heart; it allows enough room for vigorous pumping but also keeps the heart in place to reduce friction between the heart and other structures. The heart has its own blood vessels that supply the heart muscle with blood. The coronary arteries branch from the aorta and surround the outer surface of the heart like a crown. They diverge into capillaries where the heart muscle is supplied with oxygen before converging again into the coronary veins to take the deoxygenated blood back to the right atrium where the blood will be re-oxygenated through the pulmonary circuit. The heart muscle will die without a steady supply of blood. Atherosclerosis is the blockage of an artery by the buildup of fatty plaques. Because of the size (narrow) of the coronary arteries and their function in serving the heart itself, atherosclerosis can be deadly in these arteries. The slowdown of blood flow and subsequent oxygen deprivation that results from atherosclerosis causes severe pain, known as angina, and complete blockage of the arteries will cause myocardial infarction: the death of cardiac muscle tissue, commonly known as a heart attack. Choices: - fibrosis - cancers - clumps - atherosclerosis A:
(A).
atherosclerosis

Ques:Q: The number, size, shape, and banding pattern of chromosomes make them easily identifiable in a what? Read this paragraph and choose the correct option from the provided answers: 13.2 Chromosomal Basis of Inherited Disorders The number, size, shape, and banding pattern of chromosomes make them easily identifiable in a karyogram and allows for the assessment of many chromosomal abnormalities. Disorders in chromosome number, or aneuploidies, are typically lethal to the embryo, although a few trisomic genotypes are viable. Because of X inactivation, aberrations in sex chromosomes typically have milder phenotypic effects. Aneuploidies also include instances in which segments of a chromosome are duplicated or deleted. Chromosome structures may also be rearranged, for example by inversion or translocation. Both of these aberrations can result in problematic phenotypic effects. Because they force chromosomes to assume unnatural topologies during meiosis, inversions and translocations are often associated with reduced fertility because of the likelihood of nondisjunction. Choices: - xerophyte - spirogyra - nanocyte - karyogram A:

Ans:karyogram

Question: Q: What was the informal female name given to the adult fossil found in ethiopia and thought to be over 3 million years old? Read this paragraph and choose the correct option from the provided answers: footprints, similar to those of modern humans, were found in Laetoli, Tanzania and dated to 3.6 million years ago. They showed that hominins at the time of Australopithecus were walking upright. There were a number of Australopithecus species, which are often referred to as australopiths. Australopithecus anamensis lived about 4.2 million years ago. More is known about another early species, Australopithecus afarensis, which lived between 3.9 and 2.9 million years ago. This species demonstrates a trend in human evolution: the reduction of the dentition and jaw in size. afarensis (Figure 29.42) had smaller canines and molars compared to apes, but these were larger than those of modern humans. Its brain size was 380450 cubic centimeters, approximately the size of a modern chimpanzee brain. It also had prognathic jaws, which is a relatively longer jaw than that of modern humans. In the mid-1970s, the fossil of an adult female A. afarensis was found in the Afar region of Ethiopia and dated to 3.24 million years ago (Figure 29.43). The fossil, which is informally called "Lucy," is significant because it was the most complete australopith fossil found, with 40 percent of the skeleton recovered. Choices: - alice - aunt - linda - lucy A:
Answer:
lucy