Challenging Biology Problems with Detailed Answers

How can genetic engineering be used to treat and cure diseases?
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The two water biomes are the marine biome and the ocean biome. a. true b. false17Answer: A lichen is a combination of an alga and a fungus growing together. a. true b. false18Answer: Musk oxen, lichens, and lemmings would be found in a grassland. a. true b. false19Answer: Oaks, maples, beeches, and hickories are usually found in a tropical rain forest. a. true b. false20Answer: Winter temperatures may drop below freezing in a desert. a. true b. false
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The blood in the lungs contains less oxygen and more carbon dioxide than the air.explain why oxygen moves from the air to the blood and carbon dioxide from the blood to the air
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3. What types of damage canintroduced species cause?
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PLZ ANSWER!!! Water covers the majority of Earth's surface and occurs in various forms.Which option correctly orders these sources from the greatest amount of water to the least amount of water? (put it in order)1. lakes and streams2. frozen in ice3. ocean4. groundwater
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Can someone please help?? Most of the eastern United States is a _____ biome.
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Stephanie F. is a 30-year-old professional woman in her first trimester of pregnancy. She and her husband entertain guests frequently and enjoy specialty cheeses on these occasions. They buy fresh produce, eggs, milk, and cheese from a local farmers market each week and limit their intake of packaged foods. She has no food aversions and eats a variety of foods. Stephanie wants to make sure her diet is nutritious and safe for pregnancy. She decides to evaluate her typical daily intake:Breakfast:Coffee with cream and sugar (2-3 cups)Orange juice (1 cup)Bagel with lox and cream cheeseLunch:Fresh vegetable salad with canned tuna or deli turkeyCheese with fruit and crackersIced tea with sugar and lemonDinner:Beef, pork, poultry, or fishPasta or riceFresh cooked vegetablesSnacks:Cookies and milkFresh fruitQuestions:1. During her pregnancy, what special considerations for food safety should Stephanie keep in mind when buying fresh produce, juice, and dairy foods at her local farmers market? Explain.2. What changes could Stephanie make to her usual breakfast to meet the current dietary recommendations for pregnancy presented in this chapter? Explain your answer.3. Due to their high content of mercury, what types of fish should Stephanie completely avoid during her pregnancy?4. What precautions regarding meat, poultry, seafood, and eggs should Stephanie be aware of during her pregnancy? Why is it important for her to follow this advice?
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what is the number of chromosomes in body cells, if in germ cells that number is n?
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There are two species of freshwater shrimp that are introduced to a pond. The first species, Caridina cantonensis, is brightly colored with red and white stripes. The second species, Caridina multidentata, is more mottled drab in coloration. Fish have an easier time finding and eating Caridina cantonensis due to their bright colors. When each of these species reproduce they produce about 100 offspring, but only 30% Caridina cantonensis offspring survive to reproductive age, while 75% Caridina multidentata offspring survive to reproductive age. A. In this situation what is natural selection selecting for? B. In this situation what is natural selection selecting against? C. How do you predict this population will evolve? D. Identify how each of the listed conditions from the above scenario that influence natural selection. Population must have variation. Some variations are favorable More offspring are produced than survive Those that survive have favorable traits Differential reproductive success
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House sparrows from England were released in the United States. They have competed with native bluebirds. These house sparrows are __________.
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An amino acid molecule includes a central carbon atom bonded to _____, a carboxyl group, and a hydrogen atom.an amino group and three fatty acidsan amino group and a nucleic acida nucleic acid and an R groupan amino group and an R groupHELPPPPP PLEASEEEE
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HELP ASAP PLEASE! BRAINLIEST & 30 POINTS FOR CORRECT ANSWER!How does DNA evidence support the theory of evolution
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In dogs, wire hair is due to a dominant gene (W), smooth hair id due to its recessive allele.a. If a homozygous wire-haired dog is mated with a smooth-haired dog, what type of offspring could be produced?b. What types of offspring could be produced in F2?c. Two haired dogs are mated. Among the offspring of their first litter is a smooth-haired pup. If these two wire-haired dogs mate again, what are the chances that they will produce another smooth-haired pup? What are the chances that the pup will be wire-haired?d. A wire-haired male is mated with a smooth-haired female. The mother of wire-haired male was smooth-haired. What are the phenotypes and genotypes of the pups they could produce?
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Choose the true statements about amyloid fibrils. 3 options are correct:a) An amyloid fibril typically forms from aggregates of misfolded peptides resulting from frameshift mutations. b) An amyloid fibril is stabilized by hydrophobic interactions between aromatic residues. c) Soluble proteins that misfold and form amyloid fibrils become insoluble. d) Because most newly synthesized proteins fold correctly, the accumulation of misfolded proteins (or fragments) tends to occur slowly, thus explaining the slow onset of disease. e) Proteins that convert to an amyloid fibril structure tend to have low solubility in their native form.
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Arteries must be thicker than veins to be able to withstand the high pressure the heart exerts as it pumps blood into them. As blood travelsthrough the body, this pressure decreases. Blood pressure is the lowest in the veins as the blood heads back to the heart.Based on blood pressure differences between arteries and veins, which of these must be true?OA Blood flow tends to be faster in arteries than in veins.O B. Blood pH tends to be higher in veins than in arteries.OC. Blood flow tends to be faster in veins than in arteries.OD. Blood viscosity tends to be higher in arteries than in veins.
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In a rainforest what might be a limiting factor for the toucan population A) lots of sunshineB) deforestation C) plenty of rainD) fertile soil
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Which of the following is true of the values of x and y in the diagram below?y
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-Why do some land types absorb water better than others?
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Habitat loss and fragmentation leads toA. More BiodiversityB. Less BiodiversityAnswer Choice:entence Starter
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Match the definition to the corresponding term.
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What does flora and fauna mean in terms of science?
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Which of the following environmental factors belongs to biotic factors? 1. Wind 2. Salinity 3. Soil moisture 4. Microorganism
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What is anatomical structure?
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How do ocean currents affect temperature? Check all that apply
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