DO NOWEvery 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

OXYGENPlants and animals need oxygenOxygen combines with food to give

energy

Carbon dioxideUsed by plants & bacteria to make food

Other gasesProvide elements necessary for life

C. Water

Makes up our cells

Transports materialsAround organismsAround Earth

Regulates temperatureHOMEOSTASIS

D. Space

Organisms need enough space to get their basic needsSunOxygenFood

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, SpaceFightingWaiting your turnMarking your territory

B. Intraspecific Competition

Occurs between same type of organism

Food, Water, Space

Also includes competition for matesCourting ritualsFighting