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Questions in biology

[Terjawab] A woman treated her home with a pesticide that kills spiders. The first application killed 78% of the spiders. Two months later, she applied the pesticide again, but it only killed 45% of the spiders. What would best explain the decrease in the effectiveness of the pesticide?

[Terjawab] Which phrase best describes DNA? A. The structure that allows biochemical reactions to occur B. The structure that translates information into action C. The molecule that contains all the genetic material D. The molecule that breaks down sugars in the cell

[Terjawab] Multicellular plants and animals have organs to perform specific functions. What do eukaryotic cells have to perform specific functions? A. ribosomes B. organelles C. cytoplasm D. vacuole

[Terjawab] A corn plant has a genotype [tex]Sstt[/tex]. What are the possible genetic combinations that could be present in a single grain of pollen produced by the plant? A. Ss, tt, St, st B. Ss, tt, St, ST C. St, st, sT, st

[Terjawab] When an atom releases a beta particle: A. The mass number decreases by one. B. The mass number increases by one. C. The atomic number increases by one. D. The atomic number remains the same.

[Terjawab] On early Earth, what was referred to as the "primordial soup"? A. The mixture of gases in the early Earth's atmosphere. B. The combination of organic compounds in warm salty water. C. The first forms of life.

[Terjawab] Can you explain what mitochondria are? Where are mitochondria found?

[Terjawab] Which statements describe organisms referred to as "colonial"? A. A multicellular organism B. Similar bacteria or protozoa which group together C. Tissue D. A group of multiple specialized cells

[Terjawab] Why does photosynthesis require water? A. Because water provides oxygen atoms B. Because water provides electrons C. Because water accepts electrons D. Because water acts as a catalyst

[Terjawab] Which one is an advantage of a multicellular organism? A. Specialized cells perform specific functions. B. Smaller cells operate more efficiently. C. Different types of cells do not need to communicate. D. The cells are simpler.