Plant Anatomy & Growth: Fungi, Secondary Growth, Sexual Cycle, Seed Dev., & Cells - Prof. , Quizzes of Biology

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Plant growth

Fig 31.

Pop Quiz

Name one characteristic offungi that is different than plants

A group of hyphae is called a______?

The term used to describe how fungi feed is ________________.

Primary growth

Fig 31.

Secondary

Growth

Fig 31.8A

Anatomy of a log

Fig 31.8B

Anatomy of a log

• Heartwood; xylem plugged with resins, acts

as an endoskeleton

• Sapwood; secondary xylem that conducts

water

Sexual lifecycle in Angiosperms

• Flowers; compressed shoots with modified

leaves

• Sepals; green, protect flowers – Petals; colorful, attract pollinators – stamens; male, have anthers at tip, deliver pollen - carpels; female, stigma, bear ovules – What is pollination?

Flowering

Pollen and

ovule

development

Fig 31.

Embryo Development

Ovule to Seed

Fig 31.

Seed development

• Triploid cell- develops into endosperm • Zygote develops into embryo • Ovule coat develops into the seed coat

Seed Germination

• Previously developing embryo starts again

after dormancy

• Seed takes up water, expands, ruptures its coat, stored nutrients are broken down and fuelgrowth