Plant Phys exam 1

All species in Plantae exhibit…

alteration of generation

How does Miosis in plants occur?

sporic meiosis

directly produces haploid spores and gametes are produced later from haploid structures by mitosis

What are some challenges to living on land?

• avoiding desiccation

• obtaining key minerals

• reproduction in absence of H20

• structural support without buoyancy

—— and ——— are the 2 glucose polymers for plants.

• amylose- 1,4 glucose polymer

• amylopectin- 1,4 glucose polymer + alpha side branches

____ is the primary component of plant cell walls.

cellulose β 1,4 glucose polymer

What does cellulose do?

• provides structural support

• very stable, rigid structure

• most abundant carbon-containing (organic) biological compound on Earth

An angiosperm is…

a plant of a large group that comprises those that have flowers and produce seeds enclosed within a carpel

What are vascular systems used for in plants?

• water & nutrient transport: xylem tissues

• carbohydrate transport: phloem tissues

  **makes up the ‘organs’ of plants- roots, shoots, leaves

What is the benefit of seeds?

• act as physical protection for embryos

• delay germination until favorable environmental conditions occurs

____ and _____ are unique to angiosperms.

flowers (reproductive strategy for dispersal) and fruits (dispersal of offspring)

____ and ____ are types of angiosperms.

monocot and eudicot

Describe cotyledons, veins, and pollen

• embryonic leaves

• vascular tissue organization

• contains male gamete

Why are angiosperms successful?

• 25000+ species

• present in all environments due to seed evolution

• 84% of terrestrial plant species