Which of the following adaptations was a key to allowing conifers to be successful in diverse terrestrial habitats
Answer: evolution of pollen
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According to the Oparin-Haldane hypothesis, which of the following was probably NOT a major
component of Earth's early atmosphere?
a. O2 (oxygen) b. H2 (hydrogen) c. CH4 (methane) d. H2O (in vapor form) e. NH3 (ammonia)
Which province of the ocean is found above the continental shelf?
a. abyssal b. benthic c. pelagic d. neritic e. oceanic
Which sequence accurately describes the path traveled by a new protein from when it first starts to be translated to its release from the cell?
A) nuclear envelope ? ER ? vesicle ? Golgi ? plasma membrane ? external environment B) cytosol ? ER ? Golgi ? vesicle ? plasma membrane ? external environment C) cytosol ? Golgi ? ER ? vesicle ? plasma membrane ? external environment D) plasma membrane ? ER ? vesicle ? Golgi ? cytosol ? external environment E) nucleus ? ER ? Golgi ? vesicle ? plasma membrane ? external environment
Which of the following layers of the epidermis contains cells that provide protection against UV radiation?
a) stratum corneum b) stratum lucidum c) stratum spinosum d) stratum basale