MoCA - Science

MoCA - Science Two birds species regularly visit feeders for sunflower seeds during the winter. For a month, several students take turns watching the feeding station from 6:30 to 7:30 every morning and recording their ...

MoCA - Science Two birds species regularly visit feeders for sunflower seeds during the winter. For a month, several students take turns watching the feeding station from 6:30 to 7:30 every morning and recording their observations. They find that whenever individuals of one species arrive at the feeder, the individuals of the other species leave. The students conclude that competition for food between the species is an important factor in their ecological relationship. The students' conclusion above would be most strengthened by adding which of the following elements to their study? - ✔✔Observing the feeding behaviors of both species under natural conditions. A scientist at a respected university announces in a press conference the discovery of a new compound that can kill several types of cancer cells with minimal harm to healthy cells. Many cancer researchers are unimpressed by the announcement. Which of the following actions taken by the scientist would convince the larger community of cancer researchers to take his claim seriously? - ✔✔Publishing the data and methodology from the work so it can be replicated Which of the following units is most appropriate for reporting a species' population density? - ✔✔Organisms per square meter A student would like to design a basket for a bicycle to carry various school-related items. The student looks up several commercial designs on the internet and decides to make a less expensive basket using materials from a hardware store and from around the home. The next step in the design process would be to: - ✔✔Figure out how much weight the basket needs to carry, what size is practical, and whether it should be in front or in back. Feedback control - ✔✔Describes a system in which the product of a process controls or is itself an input of the system. Rosalind Franklin and Maurice Wilkins's analysis of the DNA molecule with X-ray crystallography contributed to which of the following breakthroughs in DNA research? - ✔✔Characterizing the structure of the DNA molecule In 1965, scientists Arno Penzias and Robert Wilson discovered microwave radiation emanating uniformly from all directions in the sky. This discovery provided important evidence supporting: - ✔✔The big bang theory of the origin of the universe Which of the following is a common objection to genetically modified foods but not a common objection to the cloning of animals? - ✔✔Possible introduction of novel genes into wild populations A significant disadvantage of using compact fluorescent light bulbs in place of incandescent light bulbs is that compact fluorescent bulbs: - ✔✔Must be disposed of separately from household trash due to the mercury they contain X + water + energy from sunlight ----> glucose + oxygen - ✔✔carbon dioxide In plants, which of the following processes is used to release the energy stored in glucose for use in physiological functions? - ✔✔Cellular respiration Cellular Respiration - ✔✔is the biological process by which organic molecules are broken down and the released energy is used for the production of ATP. Photosynthesis - ✔✔the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. In mammals, most absorption of nutrients from the digestive system occurs in which of the following organs? - ✔✔Small intestine Which of the following taxonomic groups is the broadest? - ✔✔Class Hierarchical classification system - ✔✔Kingdom Phylum Class Order Family Genus Species Which of the following traits, if shared by two different types of organisms, would indicate the closest taxonomic relationship between the organisms? - ✔✔Body covered in fur A new species of rodent would be most likely to evolve under which of the following circumstances? - ✔✔A small group of rodents is cut off from the rest of the rodent population by a large lava flow Two parents are both carriers of the recessive allele for a sickle-cell anemia, but do not express the disorder because they are heterozygous for the trait, the offspring of these parents has what probability of being homozygous for the sickle-cell trait? - ✔✔25% Heterozygous - ✔✔describes a genotype consisting of two different alleles at a locus (Bb & bB) Homozygous - ✔✔describes a genotype consisting of two identical alleles at a given locus (BB) Nucleotides are components of the compounds that are directly responsible for which of the following functions in biological structure? - ✔✔Storing genetic information Pitcher plant populations thrive in bogs of North America Under conditions that are inhospitable to many other plant species. These carnivorous plants have adapted to the conditions of the environment by overcoming the: - ✔✔Low supplies of nitrogen and phosphorus in bogs Which of the following statements about the trophic levels in an ecosystem is accurate? - ✔✔Carnivores can be secondary consumers What is the primary role of nitrogen-fixing bacteria in the cycling of nitrogen through the environment? - ✔✔Converting atmospheric nitrogen into a form usable by plants A bottle is filled with air, tightly sealed, and then placed in an ice bath. Which of the following will occur as the bottle is cooled? - ✔✔Pressure will decrease and mass will remain constant. Which of the following explains why an uncovered pot of water being heated on a stovetop burner does not change temper