Plant Biology and Reproductive Structures

These flashcards cover key concepts from a lecture on plant biology, focusing on reproductive structures, seed development, and plant anatomy.

What type of tissue is the ovule wall in gymnosperms and is it diploid or haploid?

The ovule wall is made of diploid (2n) sporophyte tissue.

In angiosperms, what becomes of the ovary after fertilization occurs?

The ovary becomes a fruit after fertilization.

What are the three components of a seed?

1. Developing 2N sporophyte embryo, 2. Food for the embryo from the female gametophyte, 3. Protective tissue from the maturing ovule wall.

What is a key difference between gymnosperms and angiosperms regarding ovules?

Gymnosperms do not have ovaries, while angiosperms have ovules inside the ovary.

What are parenchyma cells responsible for in plants?

Parenchyma cells perform photosynthesis and store food.

Define phenotypic plasticity in the context of plant roots.

Phenotypic plasticity is when a single genotype can produce multiple phenotypes depending on environmental factors.

What type of flower contains both male and female reproductive structures?

A perfect flower contains both male (staminate) and female (carpellate) structures.

What is a fruit in botanical terms?

A mature or ripened ovary that contains seeds, and sometimes includes other fused flower parts.

How does Dodder plant gather nutrients?

Dodder lacks roots and leaves, stealing nutrients from other plants using modified roots that suck sugar.

What are trichomes and their purpose on leaves?

Trichomes are leaf hairs that block sunlight and reduce water loss by trapping moist air.