BIO120H1 Lecture Notes - Lecture 4: Sclerophyll, Chlorophyll, Epiphyte

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BIO120H1 Full Course Notes

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Autotrophs: an organism that assimilates energy either from sunlight or from inorganic compounds. Plants in hot deserts reduce their heat loads by producing finely subdivided leaves with a large ratio of edge of surface area. Palo verde: photosynthetic bark on trunks & branches; can grow without incurring heat load. & water loss through leaves: tiny and thick stemmed leaflets that contain chlorophyll. Mosquite: leaves are subdivided into leaflets that facilitate dissipation of heat. Saguaro cactus: grows to 15 m,200 yr, 5+ tonnes, extensive, shallow roots, accordion-pleated trunk, can absorb 800 l of water from one storm, use it gradually for growth. Deciduous habit: dropping leaves during dry or cold seasons can reduce water stress and tissue damage. Leaves with more turbulence better cooling: when objects are smooth boundary layers. Leaves large: thin, papery, flexible, high sa:v, flimsy, fragile, frequently deciduous,last only 1 season, prominent local examples: hardwood trees such as maples, oaks.

Related Questions

1) Describe a technique for measuring photosynthetic rate.

2) Many deciduous trees have leaves which turn yellow in the fall. What do you suppose is happening in the leaves at the cellular and molecular level?

3) Chloroplasts and mitochondria are both are unusual in that they have double membranes and contain their own set of DNA. Can you think of any explanations for this observation?

4) Some plants (grasses) tend to contain a greater concentration of chlorophyll than others (pines). Can you develop a hypothesis to explain this? Would it be testable?

is this a good description for Parthenocissus inserta, and three questions are the end regarding the paragraph?

Parthenocissus inserta, also known as thicket creeper is a deciduous (seasonally loses their leaves) woody vine plant. The Parthenocissus inserta habitat is anthropogenic (man-made or disturbed habitats), forests, shores of rivers or lakes, and rocky slopes. This plant is a climber and climbs by using tendrils. A plantâs tendrils help support the plant growth, makes it possible for the vines to attach itself to another object and provides stability to prevent breaking of its stem. The tendrils of the ticket creeper do not have adhesive disks or pads at the ends. The thicket-creeper do not have aerial roots and has hairless stalks and stems. The leaves are alternate, palmately compound with five leaflets. This means the leaves are attached to the stem in an alternating pattern and leaves originate from one point at the end of the stalk that joins a leaf to a stem. The end of the leaves has a tooth-like shape. The flowers are inflorescence dichotomously branched, without a central stalk. Each cluster can have between 10 to 75 flowers. The flowers ripened to a fleshy, bluish-black berry that contains four seeds. The Parthenocissus inserta (thicket creeper) is very much similar to the Parthenocissus quinquefolia (Virginia creeper).

Where would you add panicle? What does that mean?

inflorescence dichotomously branched what does this mean?

What are aerial roots?

greyherring51

is this a good description and can you answer question at the end? Would you add anything else Parthenocissus quinquefolia, also known as Virginia creeper is a deciduous (seasonally loses their leaves) woody vine plant. Parthenocissus quinquefolia (Virginia creeper) is similar to the Parthenocissus inserta (thicket creeper). The Parthenocissus quinquefolia habit is anthropogenic (man-made or disturbed habitats), mesic forests (good supply of moisture for growth), forest edges, hedgerows, thickets, openings in forests, talus slopes It is an aggressive vine that can easily climb to the top of tall trees. The plant is a climber and climbs by using tendrils. A plantâs tendrils help support the plant growth, makes it possible for the vines to attach itself to another object and provides stability to prevent breaking of its stem. The tendrils of the Virginia creeper have adhesive disks or pads at the ends to help it climb. The Virginia creeper has aerial roots and stalks and stems are hairy. The leaves are alternate, palmately compound with five leaflets. This means the leaves are attached to the stem in an alternating pattern and leaves originate from one point at the end of the stalk that joins a leaf to a stem. The end of the leaves has a tooth-like shape. The flowers are Inflorescences divergently branched, with a distinct central stalk (Flora of North America 2017). Flowers are arranged in a panicle (clusters) and each cluster can have between 80 to 150 flowers. The flowers ripened to a blue-black berry.

Inflorescences divergently branched what does this mean?

burgundyguinea-pig124

BIO120H1 Lecture Notes - Lecture 4: Sclerophyll, Chlorophyll, Epiphyte

BIO120H1 Full Course Notes

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