Bio 101 Day 16

Bio 101 Day 16 - Flowering Plant Structure, Growth, and...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Flowering Plant Structure, Growth, and Differentiation -90% of seeded plants are vascular and characterized by flowers, endosperm, double fertilization, cotyledons and seeds enclosed within fruits -Most successful and most diverse of the plant kingdom Revision—Monocots (Class Monocotyledones) -Class includes: palms, grasses, orchids etc -most have floral parts in trees -Leaf venation is parallel (unbranched) -Fibrous root system -Secondary growth is absent, but can contain sclerenchyma tissue—hard and wood-like -Seeds each contain: -One cotyledon or embryonic seed leaf -Endosperm or nutritive tissue in maturing seed -Scattered vascular bundles Revision—Eudicots (Class Eudicotyledones) -Class includes oaks, roses, cacti etc -Leaf venation is netted (megaphyll) -Gymnosperms and woody eudicots have secondary growth -Usually have floral parts in fours or fives, or multiples thereof -Seeds each contain 2 cotyledons -Endosperm is reduced; nutrition in cotyledons at germination -Taproot system and vascular system in a ring Herbaceous (non-woody) and Woody Flowering Plants -Herbaceous Plants:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
-Annuals—certain aerial stems die back each year -Biennials—complete life cycle in 2 years -Perennials—aerial parts grow all the year round -Woody Plants: -Aerial parts persist; hard, lignified secondary tissues -Deciduous—shed leaves in Winter, new in Spring -Evergreen—shed leaves very slowly (or not at all) Life History Strategy -Long-lived trees thrive in tropical rain forests; small, short-lived plants can’t compete -Small, short-lived plants thrive in relatively unfavorable environments -Opportunistic; less competition -Seed rapidly, turnover quickly, genetic variation favorable -Annuals prevail over woody perennials, e.g. plants in a desert after a rain storm Sizes of Plants -Duckweed—larger green plants -Water-meal plants—tiny floating smallest flowering plants—herbs -Red tingle tree with massive bases (Australia Eucalyptus tree) Roots and Shoots -Root System: -Generally underground, branch extensively -Anchors plants -Obtains water and dissolved minerals from the soil for plant’s nutrition
Background image of page 2
-Food storage Shoot System:
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 9

Bio 101 Day 16 - Flowering Plant Structure, Growth, and...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online