BELL WORK: Read the question below and write your answer. Vines in the jungle climb up tall trees in order to reach the sun. Name TWO tropisms illustrated here. EXPLAIN your answer! 2:001:591:581:571:561:551:541:531:521:511:501:491:481:471:461:451:441:431:421:411:401:391:381:371:361:351:341:331:321:311:301:291:281:271:261:251:241:231:221:211:201:191:181:171:161:151:141:131:121:111:101:091:081:071:061:051:041:031:021:011:000:590:580:570:560:550:540:530:520:510:500:490:480:470:460:450:440:430:420:410:400:390:380:370:360:350:340:330:320:310:300:290:280:270:260:250:240:230:220:210:200:190:180:170:160:150:140:130:120:110:100:090:080:070:060:050:040:030:020:01End

Set up the journal page below: Page: 63 Date: Title: Plant Reproduction Essential Question: How do systems interact to help a plant reproduce? Yes, Cornell notes!

Yesterday, we saw the parts and processes involved in plant response. Today, we will focus on: Response – how do plants respond to their environment? Reproduction – how do plants make more plants? Transport – how do things move around inside a plant? We combine individual parts to make a system. Those systems work together to help a plant maintain homeostasis.

FLOWERS: reproductive organs of some plants Write this at the top of your flower diagram!

Flowers can be male, female, or both. Flowers with both sets of reproductive structures are called “perfect” flowers. We will use perfect flowers for our examples…just remember that not all flowers are created equal! Make a tab at the top of your flower diagram. Use the tab to glue your flower onto your journal page. We will be writing notes UNDER the diagram!

MALE STRUCTURES  ANTHER: produces pollen (sperm); where meiosis occurs  FILAMENT: supports the anther  STAMEN: anther + filament Find a BLUE crayon or pencil. Color the male structures of your flower BLUE. Be sure to add a key on your diagram!

FEMALE STRUCTURES:  STIGMA: sticky; receives pollen  STYLE: tube connecting stigma & ovary  OVARY: contains ovules (eggs); where meiosis occurs  PISTIL: stigma + style + ovary Find a RED crayon or pencil. Color the female structures of your flower RED. Be sure to add a key on your diagram!

Pollination is the fertilization of ovules. Discuss with your table: based on your diagram, how do you think pollen gets to the ovary? Be prepared to share your answer with the class! 2:001:591:581:571:561:551:541:531:521:511:501:491:481:471:461:451:441:431:421:411:401:391:381:371:361:351:341:331:321:311:301:291:281:271:261:251:241:231:221:211:201:191:181:171:161:151:141:131:121:111:101:091:081:071:061:051:041:031:021:011:000:590:580:570:560:550:540:530:520:510:500:490:480:470:460:450:440:430:420:410:400:390:380:370:360:350:340:330:320:310:300:290:280:270:260:250:240:230:220:210:200:190:180:170:160:150:140:130:120:110:100:090:080:070:060:050:040:030:020:01End

POLLINATION: pollen transfers from anther to stigma; creates fertilized ovules (seeds) Click to view the animation Find a GREEN crayon or pencil. Draw an arrow to show the path pollen takes ALL THE WAY DOWN TO THE OVARY! Be sure to add a key to your diagram.

CROSS-POLLINATION: occurs between more than one flower; promotes genetic variation SELF-POLLINATION: occurs within one flower; reduces genetic variation

How can pollen be transferred? So, this is what sexual reproduction in plants looks like...awkward

Pollen can be transferred by: wind, bees, butterflies, birds, moths, flies

So then what??

Seeds and Fruit {The ovary ripens into a fruit. {OVARY = fruit {After a flower is fertilized, the petals and sepals fall off. {The ovule becomes a seed. {OVULES = seeds *hormones help with this development*

Flower to Fruit

Seeds and fruit can be dispersed (spread) by: wind, animals, gravity

What about reproduction without flowers?

Mosses, ferns, and related plants have swimming sperm. The leafy tips of mosses produce male and female sex cells. Male sex cells swim through water on the surface of the plant to reach and fertilize female cells. Fertilization produces a spore capsule, that scatters spores into the air. What kind of environmental conditions would be required for reproduction in these plants? What kinds of limits does external reproduction impose on these plants?

Debrief/Summary: Explain how gravitropism and the reproductive system can work together. WORKTOGETHERWORKTOGETHER