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Lecture 4
Fruits and Cones
14
Biology
Undergraduate 1
09/17/2010

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Cards

Term
define a fruit:
Definition

A fruit is an ovary and its accessory parts that have developed and matured, such as the ovule(s), which develop into seed(s)

 

Fruits are found exclusively in flowering plants.

Term

What is a pericarp?

 

 

 

 

Definition
The pericarp is the part of a fruit that contains the endocarp, mesocarp, and exocarp.
Term

define endocarp:

 

Definition
The endocarp is the boundary around a seed within a fruit.
Term
define mesocarp:
Definition
The mesocarp is the fleshy tissue of a fruit that lies between the endocarp and the exocarp.
Term
define exocarp:
Definition
The exocarp is the skin of a fruit.
Term
What are the two main types of fruits?
Definition
dry fruits, which have a dry mesocarp at maturity, and fleshy fruits, which have a fleshy or partly fleshy mesocarp at maturity
Term
What is the difference between a pome and a drupe?
Definition
A pome has a leathery endocarp (apples and serviceberries) and a drupe has a bony endocarp (cherries).
Term
What are the two main types of dry fruits, defined by whether or not they split at maturity?
Definition

dihescent fruits-split at maturity

indihescent fruits-do not split at maturity

Term
What are the three types of indihescent fruits?
Definition

Achenes: dry, small, unwinged, 1-seeded (sycamore)

Samaras: dry, winged, 1-seeded (maples and ashes)

Nuts: dry, 1-seeded, with a hardened pericarp (acorns)

Term
What are the three types of dihescent fruits?
Definition

Follicles: split along one line (magnolia)

Legumes: split along two lines (locusts)

Capsules: sypically split along 2 or more lines (poplars and aspens)

Term
define a compound fruit:
Definition
A compound fruit contains more than one ovary.
Term
define an aggregate fruit:
Definition
An aggregate fruit is one that forms when a single flower has multiple carpels that become multiple ovaries.
Term
define a multiple fruit:
Definition
A multiple fruit is one that forms froms when multiple flowers mature into fruits in a single mass.
Term
name the four parts of a female cone:
Definition

-bract

-scale

-umbo

-apophysis

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