How does a decrease in abiotic factors impact the population growth in an ecosystem? pls explain your answer. :) thx!

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

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.

Explain why scientists use the word dominant for certain traits.