Biology Need help on homework?
Yes. Males have the Y chromosome (thus, XY). The Y chromosome says "you, the future baby, are now a male" and codes for male physical properties (male reproductive system, facial hair, deep voice, etc.). Thus, obviously the Y chromosome contains pretty darn important genes, or else there would be no way for people to be males. No males = no continuation of the species = organisms cannot survive.
Need some help with my Biology Hw?
Which of these processes does NOT require DNA replication? A. Mitosis B. Meiosis C. Cell Division D. Cell Growth Why can the deletion of a single nitrogen base in DNA be harmful to an organism? A. Deletion causes chromosomes to join backwards or to join the wrong chromosomes. B. Deletion causes nearly every amino acid in the protein to change. C. Deletion causes a gamete to have an extra chromosome. D. Deletion causes chromosomes to join with the wrong chromosome. Which of the following processes does NOT involve ribonucleic acid? A. Replication B. Translation C. Transcription D. Codon attachment to a ribosomes Which processes results in an RNA copy of a DNA strand? A. translation B. transcription C. replication D. mitosis Which does NOT describe restriction enzymes? A. they are bacterial proteins. B. they have the ability to cut double-stranded DNA. C. they can carry DNA from one species into a host cell. D. there are hundreds of restriction enzymes. Which series correctly sequences interactions in nature from larger to smallest? A. population, ecosystem, community B. species, organism, community C. ecosystem, community, population D. community, population, ecosystem Which terms are NOT related? A. water cycle- precipitation B. phosphorus cycle- evaporation C. nitrogen cycle- nitrogen fixation D. carbon cycle- photosynthesis A manufacturing plant is located on the bank of a river. One day, toxic chemicals from the plant accidentally spilled into the river. Fish absorbed some of these chemicals into their bodies. Later, a hawk living near the river was found to have the same toxic chemicals in its system. Which statement best explains why? A. the chemicals entered the air. B. the chemicals entered the food chain. C. the chemicals were contagious. D. the chemicals commonly are found in the environment. Based on what you've learned about the cycling of material through ecosystems, predict which material would most likely be added to a chemical fertilizer to increae soil productivity. A. H2O B. CO2 C. N2 D. NO3 Thank you so much :)
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1. Early autotrophs broke down carbon dioxide for a carbon source, and released oxygen as a result. This increased the amount of oxygen in the atmosphere and allowed aerobic life forms to exist. 2. I have no idea, I'm sorry. 3. The answer is basically the same as number 1. Are you in an AP Bio/ college bio class? This seems just like one of our awful reading guides... if you are, good luck!
I need some help with biology homework?
Which of the following lists contain elements that have ionic forms critical to muscle contraction and action potential generation? A. C,H,O,N B. Ca,P,S C. Cl,Mg,S D. Ca,N,K E. Fe,Mg,P
BIOLOGY HOMEWORK HELp!!!!!!!!!!!!!?
1. translation is the process of converting DNA into an mRNA strand Translation is the process of converting mRNA into a chain of amino acids to form a protein 2. Translation occurs outside the nucleus with the ribosomes 3. One tRNA molecule contains one anticodon triplet sequence (i.e. CGC - which would code for/match GCG) 4. If the new sequenced formed (from links of tRNA molecules) was CCG TGC GGG, then then the mRNA strand must have copied GGC ACG CCC from the DNA strand I hope this helps! Best of Luck!
Can someone help me with my Biology Homework?
ANSWER is: a. increaseEXPLANATION :As the blood travels through the inferior vena cava into the right atrium, the amount of CO2 present in the blood will increase. As the inferior and superior vena cava will bring blood which is oxygen poor from the body into the right atrium.The pulmonary artery will channel oxygen-poor and carbon dioxide rich blood from the right ventricle into the lungs.And the pulmonary veins will bring oxygen-rich blood to the left atrium.You can visit General Biology Questions, Advanced Biology Questions, Students Homework HelpThey solve general queries of a person, student's homework help, textbook solutions and all related queries...You can pose your query there and can also see answers of the users who asked questions. So may be you find your answer there without posing your query. Even you can visit blog there also to see answers of related queries.If still you need help in biology homework then you can pose your query there. They provide first two questions free for genuine Email ID.Thanks
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1. When an antibody attaches to a virus, what occurs? A. The virus is destroyed. B. The virus replicates. C. The antibody turns into a T cell. D. The antibody turns into a macrophage. 2. Which description best fits the role of macrophages? A. Macrophages make T cells. B. Macrophages make memory cells. C. Macrophages engulf pathogens. D. Macrophages trigger allergies. 3. Which statement correctly describes the immune system of a person with AIDS? A. It has many memory cells. B. It uses only the humoral response. C. The number of helper T cells is low. D. It has more antibodies than it can use. 4. Which statement applies to viral pathogens but not bacterial pathogens? A. They all cause the influenza disease. B. Antibiotics have no effect on them. C. They all cause an autoimmune response. D. Doctors have had much success treating the diseases they cause. Thanks!
Carbon-12 and carbon-14 biology hw?
Carbon-12 is the most abundant isotope, it makes up about 98% of organic matter. In terms of stability, it's stable and so is carbon-13. It has 6 protons and 6 neutrons. Carbon-14 is not abundant at all. It makes up a fraction of a percent of organic material. It's unstable and it has 6 protons and 8 neutrons. Hope that helps!
Biology homework help please!!!!!!!!!!?
THE MAIN DIFFERENCE IS THAT AMPHIBIANS ARE DEPENDANT ON WATER. So obviously, adaptation will be based on this difference... Most reptiles are not as dependent upon nearby water as amphibians. Reptiles have solved the drying-out process by having the skin covered with hard, overlapping scales which help to keep moisture from excaping the body. Reptile eggs do not need to be laid in water because, unlike amphibain eggs, they have a tough shell which helps conserve moisture. Some reptiles may even retain eggs inside the body until they hatch, then giving birth to live young. reptiles have claws on their feet to help climb, run and dig on land. Because most reptiles are not dependent upon a body of water for reproduction, they can live in places such as deserts where it would difficult for amphibians to survive. Some reptiles, such as crocodilians, many turtles, some snakes and a few lizards have gone back to living in the water, but they breathe air through their lungs and must still emerge from the water to lay their eggs on land
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