IdeasCuriosas - Every Question Deserves an Answer Logo

Questions in biology

[Answered] Carbon and oxygen are helpful in metabolic studies because: Select one: A. They are inexpensive elements. B. They are incorporated into organic material and commonly found in living things. C. Scientists know a lot about these two elements. D. They are plentiful in nature.

[Answered] 1. Enzymes are important because they: A. contain water B. speed up chemical reactions C. contain genetic material D. help the cell maintain its shape 2. Which term refers to the diffusion of water through a membrane? A. osmosis B. engulfing C. active transport D. facilitated transport

[Answered] Lamarck proposed two ideas to explain: A. how organisms change through time. B. the principles of geology. C. the age of the Earth. D. the slow movement of the Earth's tectonic plates.

[Answered] In a cell, what is the function of the cell membrane? A. It controls the entry and exit of substances. B. It removes waste and stores ingested food. C. It generates energy for the cell. D. It only maintains the cell shape.

[Answered] When cells break down food molecules, energy is A. Released quickly B. Released entirely as body heat into the environment C. Stored permanently in ATP molecules D. Stored temporarily in ATP molecules

[Answered] How can natural selection affect a predator-prey relationship in an ecosystem? Choose all answers that are correct. A. Predator and prey populations are both affected by natural selection. B. Changes in one population do not affect the other population. C. Only select generations are affected by natural selection over time. D. Traits that allow for survival and reproduction at a greater rate than those without the trait will be selected by nature.

[Answered] Which statement about plant cells is most accurate? A) Plant cells take in nutrients by phagocytosis. B) Plant cells do not need nutrients since they make their own food. C) Plant cells get nutrients through the decomposition of organic matter. D) Plant cells, like animal cells, take in small molecules through the cell membrane.

[Answered] If a mother carries a recessive allele for a genetic disorder, such as cystic fibrosis, under what circumstances will her children inherit the disorder? A. The children's father must also carry the recessive allele. B. The mother's father must also carry the recessive allele. C. The paternal grandfather must also carry the recessive allele. D. The children must be female like the mother to inherit the disorder.

[Answered] The analogy of ATP molecules and rechargeable batteries is fitting because ______. Select one: a. all batteries are rechargeable, and all glucose molecules are rechargeable b. ATP cannot be used over and over again by the mitochondria c. ADP represents electricity that powers appliances d. the reactions of cellular respiration convert ADP back into ATP

[Answered] Weightlifters are often concerned with the amount of protein in their diets because growing muscles require protein. Just as muscles need the basic building block of protein, protein itself also has basic building blocks. Which of the following are the building blocks of protein? A. Monosaccharides B. Amino acids C. RNA D. Starches