DO NOW Every year, monarch butterflies from Canada and the United States spend the winter in central Mexico. The dry and mild climate in Mexico allows the monarch butterflies to survive the winter. One winter, a week of storms caused freezing temperatures and 43 cm of snow in Mexico. What was the most likely impact of these storms on the monarch butterflies? A) Monarch butterflies died in large numbers. B) Monarch butterflies immediately migrated back to the United States. C) Monarch butterflies did not migrate from Canada and the United States the next year. D) Monarch butterflies evolved several new adaptations to survive the winter in Mexico.

Explanation A) Monarch butterflies died in large numbers. Every living thing has a range of temperature they can survive in (Homeostasis). Above or below that temperature, they die. Evolution takes time. Instinctual behavior (like migration) will not change that quickly.

Needs of Living Things Objective: 1) To identify the basic needs of all living things. 2) To describe competition.

I. Needs of Living Things

A. Source of Energy Sunlight  Primary source of energy  Needed for photosynthesis Food  Made by producers  Carbohydrates, Fats, Proteins Other Chemical Energy  Chemosynthesis

B. AIR OXYGEN  Plants and animals need oxygen  Oxygen combines with food to give energy Carbon dioxide  Used by plants & bacteria to make food Other gases  Provide elements necessary for life

C. Water Makes up our cells Transports materials  Around organisms  Around Earth Regulates temperature  HOMEOSTASIS

D. Space Organisms need enough space to get their basic needs  Sun  Oxygen  Food Some organisms need shelter

What happens when there are not enough basic materials for living things to get what they need to survive?

II. Competition

A. Interspecific Competition Happens between different types of organisms Food, Water, Space  Fighting  Waiting your turn  Marking your territory

B. Intraspecific Competition Occurs between same type of organism Food, Water, Space Also includes competition for mates  Courting rituals  Fighting