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Questions in biology

📝 Answered - An excess of carbon dioxide (CO2) in a chloroplast makes conditions there more acidic. Such a change can cause protein molecules in cells to change shape and stop functioning. Which change is most likely to happen if a chloroplast contains too much CO2? A. An increase in the amount of CO2 that the cell can absorb B. A decrease in the formation of H2O in thylakoids C. An increase in the amount of O2 that the cell can absorb D. A decrease in the formation of NADPH by the light reactions

📝 Answered - What is the movement of water across a plasma membrane called?

📝 Answered - What does having higher fitness mean in an evolutionary sense? A. A particular genotype produces stronger or healthier individuals than another genotype does. B. Species with more allele variations have a higher probability of surviving changing environments. C. Individuals with genotypes favorable for current conditions are more likely to survive and reproduce. D. An individual with better alleles will be more likely to win competitions for mates.

📝 Answered - Mention any two secondary sexual characteristics or changes that take place in girls.

📝 Answered - Which of these best describes an experiment? A. A study that changes one variable and observes the effects on another variable. B. A study that observes two variables to determine whether they change together. C. A study that measures a variable at regular intervals over a long period of time.

📝 Answered - All of the following aided the survival of dinosaurs EXCEPT: A. being ectothermic B. drought resistance C. extinction of other animal species D. leg structure

📝 Answered - Which process allows some plants and animals to regrow certain body parts? A. regeneration B. binary fission C. budding D. sporulation

📝 Answered - Why are lichens a good pioneer species after a volcanic eruption? A. They are able to grow on moist soil. B. They are able to grow on bare rock. C. They are able to attract animals. D. They are able to grow without water.

📝 Answered - The semisolid material that suspends and supports the collagen fibers and is part of the organic materials in the matrix of bone is the __________ substance.

📝 Answered - Which best explains why blood is considered to be a suspension? A. It has nutrients that cannot be dissolved. B. It contains particles that can settle out. C. It has nutrients that are dissolved in its liquid portion. D. It contains particles that mix on a molecular level.