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Biology answers to 178 questions

Answer: D.the pelvis Bones of the axial skeleton in humans include the skull, the middle ear, the ossicles, the hyoid bone, the rib cage, the sternum, and the vertebral column. The full human skeleton is a combination of the axial…
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Answer: B. haploid cells In meiosis, a single diploid cell divides twice to produce four haploid cells, each containing half the amount of genetic information. In mitosis, however, a single cell divides, giving two identical diploid daughter cells, with each…
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Answer: C. help control body temperature. The cardiovascular system consists of the heart, together with a closed system of vessels which includes the veins, arteries, and capillaries. The capillaries are the most numerous of the blood vessels and they help…
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Answer: C. Transporting respiratory gases The lymphatic system is a part of the immune system, important for the cleaning within the fluids of the body. It also helps in producing an immune response to a certain disease. The lymphatic system…
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Answer: A. If populations can interbreed, they are considered one species. Reproductive isolation is required for speciation to occur as it involves all of the mechanisms involved in evolution, including the behaviors and the physiological processes necessary for speciation. In…
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There are several structures and organelles found in a typical plant cell but not found in an animal cell. Some of these structures include the cell wall, chloroplasts, and large vacuoles. Although plant cells and animal cells still have some…
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Answer: B. Compare the length of DNA among members of a species With modern taxonomy, both the internal and external structures of an organism can now be studied and this is important in getting information regarding certain organisms related to…
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Answer: C. ribosomes The ribosomes can be found in the endoplasmic reticulum. There are two types of endoplasmic reticulum; they are the smooth endoplasmic reticulum and the rough endoplasmic reticulum. The ribosomes are found on the latter. The ribosomes are…
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Answer: C. happens daily Circadian rhythms are processes that occur in a 24-hour cycle. A good example of a circadian rhythm is the appearance of fireflies at dusk because it happens daily, at a specific time. The time frame between…
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Answer: True. By phagocytosis, amoebas are capable of feeding and this is a very useful mechanism in the general feeding structure of the amoeba. Amoebas are non-selective in their general nutrition as they will literally eat whatever they can. Generally,…
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Answer: B. tracking caloric intake A person who desires to lose weight in a healthy manner should focus on total calorie intake by intentionally cutting the number of calories consumed per day. Keeping a record of the calorie intake of…
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Answer: C. Adaptive evolution is a fluctuating change in a trait. As a result of our ever changing environment, adaptive evolution leads to a fluctuating change in traits. With evolution leading to changes in organic matter over time, adaptive evolution…
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Answer: A. Other living things cannot use atmospheric nitrogen. The nitrogen cycle involves a series of mechanisms leading to the interconversion of nitrogen and nitrogenous compounds gotten from the atmosphere. In the nitrogen cycle, bacteria are very important because atmospheric…
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Answer: D. creating amino acids Amino acids are the building blocks of proteins. A typical amino acid structure consists of a central carbon atom covalently bonded to a carboxyl group, an amino group, and a hydrogen atom. When numerous amino…
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Answer: D. Schleiden and Schwann The widely known cell theory was developed by two scientists; Theodore Schwann and Matthias Jakob Schleiden. “The cell is the most basic unit of life” is the second item in the cell theory. This explains…
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The five strength training principles are: Overload Recovery Specificity Reversibility Periodization In overload, extreme ascending amounts of stress are placed on the body. This infliction causes a form of strain on the muscles, leading to adaptations and then improving fitness…
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Answer: A. prophase, metaphase, anaphase, telophase Microscopic organisms are capable of growing via cell replication. When a single-celled organism divides and in the process produces identical daughter cells, it is called mitosis. Mitosis is very essential for growth and also…
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Answer: A. Plants fix carbon and release oxygen, and animals release carbon and use oxygen. The carbon cycle describes just how carbon is circulated in various forms through nature. As a constituent of all organic compounds, carbon is found and…
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Answer: B. intercalted discs Intercalated discs are structural formations located just between the myocardial cells of the heart. They help in bonding cardiac muscle cells together and also for transmitting sensory signals between cells. These structures are required for a…
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The organ responsible for storing and compacting waste before elimination is the rectum. The rectum is the end point of the large intestine and it acts as a temporary storage for feces. All of the contents of the rectum are…
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Answer: C. Vacuoles are larger in plant cells than in animal cells. Vacuoles are organelles found in cells of plants and fungi. It is also found in some cells of bacteria, protists, and animals. In plant and fungal cells, vacuoles…
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Answer: D. all eukaryotic cells Cellular respiration and photosynthesis are two similar cellular processes and at the same time, very opposite. While photosynthesis works by utilizing carbon dioxide and water and converting it into glucose, cellular respiration works by breaking…
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Answer: D. Too much calcium Too much calcium will lead to weakened muscle and low functionality of the kidney. While calcium is very important in bone strengthening and also for a healthy lifestyle, it becomes detrimental if taken in very…
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When cells are duplicated, there is transfer of DNA or genetic information from the parent cell to the daughter cells. So for this transfer to be made possible and to ensure equal transfer of this genetic information to the daughter…
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Answer: B. 5-10 minutes Bacteria are very tiny micro-organisms capable of splitting and multiplying at a very fast rate. Bacteria are known to double every four to five minutes. A single-celled bacteria cell can become two million in only a…
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Eukaryotes are organisms whose cells contain a clearly defined nucleus. Unlike prokaryotes, eukaryotes do not contain primitive organelles. Instead, membrane-bound well defined organelles are found in a eukaryotic cell. A typical eukaryotic cell is larger than that of a prokaryote.…
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Answer: A. The sum of all genetic traits in a population’s individuals at a given time A gene pool is a collection of a variety of genes in an interbreeding population. A gene pool means the sum of a population’s…
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Photosynthesis is the process by which plants and other autotrophs use sunlight to produce food from carbon dioxide and water. In other words, during photosynthesis, carbon dioxide is taken in by plants and through a series of reactions of this…
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Answer: C. Is the maintenance of relatively stable internal environment. Homeostasis is the ability of cells, tissues, and organs to maintain, regulate, and ensure stability of the body system while adapting to certain conditions to ensure survival. It is the…
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Answer: C. the relative contributions of genes and environment in a population Studying close relatives makes it easier for behavioral geneticists to single out the contributions of environment and genes in a population. Due to differences in genetic factors, differences…
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