Grade 10 Biology: Lesson 7 part 1

photosynthesis converts (1) __________ into (2) ____________ in the form of glucose?

( 1) light energy (2) chemical energy

what is used up in photosynthesis and what is produced?

Carbon Dioxide and Water are used up while Oxygen is produced

in order for leaf to function what does it have?

different types of cells within it that perform specific tasks for the leaf and therefore the whole plant

Epidermal Tissue Cells

• cover top and bottom layers of leaf

• Flattened cells

• Create protective layer for leaf Covered by a waxy cuticle (less water loss)

• have no Chloroplasts

• are transparent to allow light to pass through

Palisade Tissue Cells

• Found just beneath Epidermal Cells

• Long and narrow cells (column-like)

• Tightly packed layer

• Main type of Photosynthetic cells in leaf exchange

• Packed with Chloroplasts

Spongy Tissue Cells

• Layers of cells beneath Palisade Cells

• Round shape

• Very loosely packed with many air spaces between them

• contain Chloroplasts to carry out photosynthesis

• Structure allows gas and water exchange with outside environment

what does the structure of spongy tissue cells allow?

gas and water exchange with the outside environment

Stomata and Guard Cells

• Allow Carbon Dioxide to enter the underside of the leaf

• Allow Oxygen and Water Vapour to exit the underside of the leaf

• Surrounded by two guard cells that regulate how the Stomata open and close

the stomata is surrounded by?

Surrounded by two guard cells that regulate how the Stomata open and close

Vascular Tissue Cells

• Form series of tubes allowing Water and Sugars to be transported in and out of leaf

• Visible as Veins in a leaf

• Made up of Xylem and Phloem Tissues

• Xylem carries water and minerals from the roots to the leaves

• Phloem carries sugars from the leaves to the rest of the plant

what do Xylem tissues do?

carries water and minerals from the roots to the leaves

what do phloem tissues do?

carries sugars from the leaves to the rest of the plant

the vascular tissues cells are made of of?

Xylem and Phloem tissues

what does the stomata do?

Allow Carbon Dioxide to enter the underside of the leaf and Oxygen and Water Vapour to exit the underside of the leaf

advantages of multicellular organisms

• A larger size

• A variety of specialized cells

• An ability to thrive in broader range of environments

what's the organization of multicellular organisms

-Atoms -Molecules -Organelles -Cells -Tissues -Organs -Organ Systems -Organisms

what's the chemical equation for cellular respiration

C6H12O6+602 ---> 6H2O + 6CO2

what's the chemical equation for photosynthesis?

H2O + CO2 + light energy ---> C6H12O6 + 02

when does photosynthesis occur

at day because it needs sun energy

when does cellular respiration occur?

during night and at the day

how many tissue cells are there

there are 4 tissue cells: Epidermal, Palisade, spongy and vascular

what tissue cells contain chloroplasts?

palisade tissues, spongy tissue cells contain chloroplasts

what does the cuticle do?

prevent evaporation of water

what do the vascular tissue cells do?

the vascular tissues transport fluids throughout the plant

what does the stomata allow?

the stomata allows gases to enter and exit the leaf

what does the upper and lower epidermal tissues do?

they protect the top and bottom of the leaf

what two tissues help to carry out photosynthesis

palisade and spongy tissue help to carry out photosynthesis