Other Activities

  1. Clip a high-contrast, black-and-white film negative onto a leaf, and place it in the light for at least 4 days. After 4 days, detect the presence of starch. What is the pattern?
  2. Extract sugar from sugar beets or sugarcane.
  3. Use cobalt chloride strips to measure transpiration in your favorite houseplants in sunny or shady locations, and plan a watering regime based on what you dctcct.

NAME DATE

LAB SECTION NUMBER

WORKSHEET 5-1 EXERCISE A: THE INS AND OUTS OF COj

I. DETECTING NET PHOTOSYNTHESIS

Attach graphs of the change in C02 over time for your plants (print out the results monitored by your computer). Record the plant species, environmental conditions, light intensity, and any other factors of importance.

What factors had the greatest effect on photosynthesis?

2. DETECTING RESPIRATION IN PLANTS

Attach graphs of the change in C02 over time for your plants (print out the results monitored by your computer). Record the plant species, environmental conditions, light intensity, and any other factors of importance.

What factors had the greatest effect on respiration?

3. DO PLANTS NEED OXYGEN?

What is the effect of 02 on germination?

What is the correlation between germination and respiration as monitored by changes in C02 levels?

4. HOW DOES C02 ENTER LEAVES?

What did you observe from this experiment?

What is the correlation between stomata abundance and movement of C02?

NAME DATE

LAB SECTION NUMBER

WORKSHEET 5-2 EXERCISE B: SAVING FOR ANOTHER DAY—STORING STARCH

Sketch the outline of the leaves and indicate the variegation pattern. Use a colored pencil to indicate where you detected starch. If no starch was detected, report "no starch."

Variegated leaf grown in light

Variegated leaf grown in dark

Solid leaf grown in light

Solid leaf grown in dark

What is the effect of light on starch production?

What is the correlation of the pattern of variegation with starch production?

Building Your Own Greenhouse

Building Your Own Greenhouse

You Might Just End Up Spending More Time In Planning Your Greenhouse Than Your Home Don’t Blame Us If Your Wife Gets Mad. Don't Be A Conventional Greenhouse Dreamer! Come Out Of The Mould, Build Your Own And Let Your Greenhouse Give A Better Yield Than Any Other In Town! Discover How You Can Start Your Own Greenhouse With Healthier Plants… Anytime Of The Year!

Get My Free Ebook


Post a comment