Transcript Photosynthesis - Aspen View Academy

Photosynthesis
Plant Unit
Vascular or Nonvascular
Why?
What four things do plants need in order
to begin photosynthesis?
Photosynthesis

Plant process of synthesizing
their own food
1. Plants
trap the sun’s light
energy and use the energy to
break down water into
hydrogen and oxygen.
2. Plants
take in carbon dioxide
and combine with the
hydrogen and oxygen to form
glucose (sugar).
http://studyjams.scholastic.com/studyjams/jams/science/plants/photosynthesis.htm
Chloroplast

The plant organelle where photosynthesis occurs

Chlorophyll within the chloroplast captures the
light energy from the sun
Plant Reproduction

Gametes-reproductive cells

Asexual reproduction-plants reproduce without male and
female gametes

Sexual reproduction-plants reproduce using male and
female gametes
Asexual Reproduction

Many methods

New plant is almost always a clone of the parent plant
(genetically identical)

Disadvantage: that mutations can lead to distinction in all
clones from the parent plant
Asexual Reproduction

Runners-grow above the ground

Grow stems that branch out along the ground

These stems have places where new roots can grow,
starting a whole new plant.

Examples: Strawberries and spider plants
Asexual Reproduction

Stems that grow below the ground are called rhizomes.

Examples: grasses, irises, bamboo, aspen trees
Sexual Reproduction

Development from spore or seed

DNA from the male gamete combines with DNA from the female
gamete

New plant is not identical both has aspects of both DNA

Leads to diversity and stronger resistance to diseases
Propagation

Cutting up parts of plants and growing entirely new plants from the
parts.

Produces identical offspring

Farmers use to produce identical plants

Can be grown from any plant organ or tissue including buds, roots,
stems, and leaves