Which of the following best describes bacteriophage t4? a. envelope fuses with host membrane during penetration into the host b. may go dormant for many generations before producing new virion particles c. packages genome by headfull mechanism d. uses rolling circle replication for genome

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.

Which description shows competition in an environment? an organism that feeds on some food an organism that finds a place to sleep three organisms of the same species living in an area three organisms battling over limited resources