Look at the images of different rocks. 1. Flat, dark color rock. 2. light colored rock with irregular black areas. 3. dark color rock with sporadic small, black areas. 4. light colored rock with impressions. 5. dark color marble. Which rocks have a fine-grained texture? Check all that apply. 1 2 3 4 5

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.

The negative impacts of nonnative species generally outweigh the positive impacts

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?