The Milankovitch cycles are changes Earth experiences that affect its climate over a period of hundreds of thousands of years. Cyclical changes in are changes in the of Earth's orbit. Changes in are the changes in Earth's tilt on its axis. Earth also experiences a around its axis. The cycles affect climate by altering the of Earth's seasons and temperature between summer and winter.

Word choices:
Shape
Eccentricity
Obliquity
Decreases
Precession
Order
Distance
Duration

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis

Ry was studying two populations of the same species of lizards. one population lived on an island and the other lived on the mainland. both populations were affected by a hurricane that hit the island and the mainland with equal force. a year later, henry was testing the gene frequency and saw a decrease in genetic variation in the island species, but not in the mainland species. which best describes a conclusion he might have reached? gene flow greatly affects small populations, but large populations can recover. genetic drift greatly affects small populations, but large populations can recover. gene flow greatly affects large populations, but small populations can recover. genetic drift greatly affects large populations, but small populations can recover.

Creation of an unnaturally uniform sample to represent a diverse populationcan be avoided by: a. including only willing b. asking another scientist for .c. choosing only identical participants.d. selecting individuals at random.