Lab 03 Worksheet Green revolution PDF

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Green revolution worksheet...

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The Green Revolution Worksheet The first photosynthetic organisms: cyanobacteria. Nostoc, Merismopedia. Sketch the specimens and note if heterocysts are present. Nostoc sp.

Merismopedia sp.

Heterocysts

Magnification: 60x Circle One: unicellular, colonial, filamentous Color: Green

Magnification: Circle One: unicellular, colonial, filamentous Color: Green

Sketch and annotate Volvox. Next to your drawing, briefly describe the locomotory response of Volvox to a light source. What structures do they use to move?

Gonidium (reproductive cell)

Gelatinous cell wall Flagella

1 BIOL 1510 | The Green Revolution

Draw and annotate the antheridia and oogonia (if present) of Chara. Include magnification.

Basal stalk

Spermatids

Spermatids

Vascular bundles

Sketch a cross-section of celery stem in the box. Identify the vascular bundles in your sketch. Based on your observations, is the celery plant a monocot or a dicot? Use the example monocot or dicot stems to determine. Briefly explain your answer.

Epidermis

Pith Cortex

2 BIOL 1510 | The Green Revolution

Label the below diagram of a leaf in cross-section with the following terms: spongy layer, vascular bundles, cuticle, guard cells, epidermis, stomata, pali Upper epidermis layer Cuticle

Palisade mesophyll cells

Spongy mesophyll cells

Xylem

Lower epidermis

Phloem

Annotate this diagram of Mnium life cycle. Include all structures and processes in Figure 1 of your Lab Manual and draw a line separating the haploid (1n) and diploid (2n) parts of the life cycle. Sperm

Embryo (2n) Fertilization

Water transport

Sporangium Egg Meiosis

Males gametophyte (1n) Spores Female gametophyte (1n) Mitosis 3 BIOL 1510 | The Green Revolution

Male + Female gametophyte spore

Diploid sporophyte generation

Sketch the gametophyte and sporophyte of live Mnium underneath the dissecting microscope. Gametophyte

Sporophyte Sporophyte

Gametophyte

Apex

Magnification: 5x Magnification: 64x Sketch Mnium antheridium (label sperm), archegonium (label egg), and spore capsule cross-section (label spores). See the Lab manual for assistance. Antheridium

Archegonium

Spore capsule Egg

Sperm

Spore Capsule

Magnification:

100x

Magnification:

100x

Magnification:

100x

Draw a pollen grain from a daisy (or similar flower) and a pollen grain from a pinecone. Remember from the lab manual you will have to prepare a slide with flower pollen. Briefly explain why these grains are structurally different. 4 BIOL 1510 | The Green Revolution

Annotate the drawing of a seed with the major features found in all seeds: embryo, cotyledon, food supply, and protective coat. Indicate the number of cotyledon (leaflets). Use the seeds already split to observe these features underneath the dissecting microscope. Embryo

2 Cotyledons

Protective coat Food supply

Annotate the following diagram of a flower with the major anatomical features: sepals, anther, stigma, filament, petals, style, ovule.

Petals Petals

Anther Style Filament

Ovule

Sepals

5 BIOL 1510 | The Green Revolution

Examine the fruits on display. For each, identify if it is dry or fleshy; determine the likely Method of dispersal (e.g. ingestion, attachment, or wind); does it have any features that protect the embryo?

The dry fruits on display are typically dispersed by water flow. There Is a seed coat that protects the embryo.

Identify at least one species for each fruit type listed Pome: Apple

Pulse: Lentils

Drup: Apricots

Capsule: Cotton

Berry: Strawberries

Samara: Samara

Nut: Walnut

Aggregate fruit: Blackberries

Grain: Wheat

Multiple fruit: Pineapples

If all angiosperms were pollinated by wind, would flowers still be colorful and smell pleasant? Briefly explain your answer. There would be no reproductive need for flowers that smelled good or were colorful so they would no longer exist.

6 BIOL 1510 | The Green Revolution...