There are exceptions to the general rule that amphibians lay eggs that develop in the water. These exceptions showed extreme variation but they do have one thing in common. What is it?
A. They all develop in some sort of pouch.
B. They all develop in desert environments.
C. They all develop in habitats with adequate humidity.
D. They all develop in a camouflaged environment.
E. They all develop more slowly than eggs developed in water.
A. They all develop in some sort of pouch.
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Choose the true statement(s) about the evolutionary divergence of horses in North America. Check all that apply.
_____ Most changes are seen as adaptations for life in grassland habitats. _____ The general trends during horse evolution are increase in body size, lengthening of limbs, reduction of digits on both sets of limbs, and tooth development for a grazing life style. _____ Horse evolution is unusual in that rates of change were uniform and constant throughout most lineages. _____ Living lineages of horses show much less diversity than existed in the past.
What feature do the carbon and nitrogen cycles have in common?
A. a large atmospheric component B. involvement in global climate change C. often a limiting nutrient D. mostly local cycling E. many microbes involved in cycling
If the energy of the sun no longer reached Earth, the primary productivity of which of the following ecosystems would be least affected?
A. taiga B. temperate rain forest C. deep sea hydrothermal vent D. desert E. coral reef
The first stage of mitosis is ____ and the last stage of mitosis is ____.
Fill in the blank(s) with the appropriate word(s).