plant anatomy lab practical 2 Flashcards by Rachel Peck

Q

Are these protosteles or siphonosteles and are they primitive or advanced

A

protostele and primitive

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Q

What type of protostele is this and give a plant example

A

Actinostele, found in Psilotum. Is typical of roots and is considered primitive.

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Q

What type of protostele is this and where is it found?

A

Plectostele, found in Lycopodium

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Q

What type of protostele is this and where is it found?

A

Haplostele, found in Lygodium.

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Q

What type of stele is this?

A

Ectophloic Siphonostele

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Q

What type of stele is this?

A

amphiphloic siphonostele

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Q

What type of stele is this?

A

a Dictyostele, which is a disected amphiphloic siphonostele

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Q

What type of stele is this?

A

Eustele, which is a disected ectophloic siphonostele.

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Q

What type of stele is this?

A

Atactostele, which consists of scattered vascular bundles. Typical of monocots.

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Q

what type of vascular bundle is this?

A

Collateral bundle. Phloem is external and xylem is internal.

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Q

What type of vascular bundle is this?

A

Bicollateral vascular bundle; phloem is on both ends with xylem in the middle.

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Q

What type of vascular bundle is this?

A

amphivasal, the xylem surrounds the phloem

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Q

What type of stem is this?

A

A monocot stem

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Q

What are the bundle sheath and the lacuna?

A

The bundle sheath is sclerenchyma and the lacuna is protoxylem that has been torn out.

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Q

Is this vascular bundle open or closed?

A

Closed. There is no vascular cambium present, so no secondary growth is possible.

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Q

Is this vascular bundle open or closed?

A

Open. It has a vascular cambium, therefore secondary growth is possible.

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Q

What type of stem is this?

A

Herbaceous dicot stem

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Q

What type of stem is this?

A

A woody dicot stem

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Q

What type of stem is this?

A

Gymnosperm stem

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Q

What is marked by X?

A

A dilated phloem ray, typical of woody dicots.

Q

What is this structure and what is it’s purpose?

A

A lenticel, which is a raised pore in the stem of a woody plant that allows for gas exchange between the atmosphere and the internal tissues.

Q

Is this cross section from a monocot or a dicot?

A

A dicot

Q

Is this from a monocot or a dicot leaf?

A

a dicot

Q

Is this from a monocot or a dicot leaf?

A

a monocot

Are these leaves from monocots or dicots?

dicots

These are all examples of what kind of leaves?

monocots

What type of venation is this?

dicohotomous

What is a paradermal section?

A cut that is parallel to the surface of an organ, such as the leaf.

what type of structure is this?

a leaf areole

What type of structure is this and what purpose does it serve?

A stomatal crypt, with trichomes inside. The stomata are on the inside and it, along with the trichomes, helps prevent dessication.

What type of cells are the arrows pointing at?

bulliform cells, used for curling up the leaf

what type of leaf is this?

gymnosperm

Is this a hydrophyte or xerophyte? Why?

Hydrophyte. Large intercellular airspaces (aeranchyma) to help buoy it in the water.

Is this a hydrophyte or a xerophyte? Why?

Xerophyte. Sunken stomata and little to no intercellular air spaces, in order to minimize water loss.

Is this hydrophytic or xerophytic? What are the large pockets?

This plant is xerophytic. The large holes are oil canals.

What is this structure and what is the plant that it is found on?

a sporangium, found on psilotum.

What type of strobilus is this?

Heterosporous. Species example is selaginella

What type of strobilus is this?

Homosporous. Example: Lycopodium

This is an example of what kind of sporangia?

Heterosporous. Example: Isoetes

This is an example of what kind of plant and leaf arrangement?

Lycopodium; whorled

This is an example of what plant?

Selaginella

What species is this?

lycopodium

What type of stele is this and what are the tissue called that hold it in place?

Diarch stele, trabeculae

What are the white structures jutting upwards called?

Ligules

Is this an antheridium or archegonium?

Archegonium

What type of structure is this?

A gametophyte with antheridia

Is this gametophyte homothallic or heterothallic?

Heterothallic

What is this?

Equisetum Stem

What are the large outer holes and smaller inner holes?

outer holes are vallecular (cortical) canals and the inner holes are carinal (vascular) canals