Some orchids are known to have a very specialized suite of floral adaptations that favor certain pollinators while precluding others. Such adaptations can prevent cross pollination (fertilization by pollen from a different species), or minimize the amount of energy devoted to the production of nectar and/or pollen. This orchid strategy can be best described as:

What controls activities within a eukaryotic cell?

Which component in a graph indicates an independent factor? a. y-axis b. x-axis c. scale

Which of the following best describes the expensive tissue hypothesis? brains require more energy, so the gut had to be reduced, and larger brains and tool use led to higher quality diets. increasing body size means that homo neanderthalensis had to include more fat in its diet. brains require more energy, so the gut had to be reduced as brains got bigger. brains require more fat, so the gastrointestinal viscera (gut) had to expand, and hands were needed to acquire more food.