gen bio 2

39問 • 1年前

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Requires a single or lone parent Does not involve the fusion of gametes Offspring are genetically identical to the parent organism

Asexual Reproduction

May either involve single (self-pollination) or two parents (cross-pollination) Requires the fusion of a sperm cell and egg cell during fertilization Enhances genetic variation because the parents and offspring are not genetically identical

Sexual Reproduction

in some species of dandelions allows the production of embryos from unfertilized eggs in ovules. is a genetic feature in dandelions, which therefore, allows them to produce viable seeds without undergoing pollination.

Apomixis

allows plant parts to produce buds that can develop into new individuals

Vegetative propagation

performs vegetative propagation through the buds that emerge from stolons or runners.

Strawberries (Fragaria sp.)

Scientific Name of Strawberry

Fragaria sp.

contain the male gametophytes in angiosperms. Each ____ consists of two sperm nuclei from the generative nucleus.

pollen grains

The ____ will transport the sperm during pollination.

tube nucleus

Each _____ in the ovary of the flower consist of eight nuclei.

ovule or embryo sac

Each ovule or embryo sac in the ovary of the flower consist of ___ nuclei.

eight

The primary sex cell that is fertilized is the ____.

egg nucleus or egg cell

Only the _____ will have descendant in seeds.

polar nuclei and egg nucleus

____ land on the stigma of the pistil. The pollen tube extends itself.

Pollen grains

The ___ moves down the style towards alongside two sperm nuclei.

pollen tube

In the ___, one of the sperm nuclei fertilizes the egg nucleus to form embryo.

embryo sac

The other sperm nucleus fertilizes the polar nuclei to produce ___.

endosperm

___ produces a diploid embryo and a triploid endosperm.

Double fertilization

The ____ allows the continuous upward growth of the plant.

shoot apical meristem

The ___ allows further growth of stems and roots by increasing their thickness.

cambium

The ___ allows the continuous downward growth of roots.

root apical meristem

The fate of different floral structure upon the maturity into a __

fruit

During ___, water is imbibed, which ruptures the seed coat.

germination

The ___ emerges from the seed, which becomes the root of the plant.

radicle

The ___ emerges from the seed, which become the stem.

hypocotyl

The ___ serve as the primary embryonic leaves in the seedlings.

cotyledons

Eventually, the ___ from plumule gives rise to mature leaves.

epicotyl

live in a damp and shady places in order to reproduce and to get enough water because they lack vascular tissues.

Mosses

Liverworts and hornworts are also ____.

nonvascular plants

The ___ system is important in anchoring and supporting the plant. It is responsible for absorbing water and minerals from the soil. The presence of its __ hairs makes this absorption efficient.

root

Xylem

water

Phloem

nutrients

__ are plants that store the product of photosynthesis in their roots.

Carrots and potatoes

The __ system of a plant anchors the plant and supports the leaves in exposing it to sunlight to make photosynthesis possible. The ___ system includes the stem, branches, and leaves.

shoot

Plants such as ___ that have a stem situated at the soil surface or underground (rhizomes). These stems contain nodes from which roots and shoots originate.

ginger and bamboo

The ___ , which contains vascular tissues for transporting water and other substances, attaches the stem to the rest of the leaf.

petiole

occur in different shapes and colors. They also have different textures and purposes which are very important in certain plants.

Leaves

The ____elements of xylem are composed of modified sclerenchyma cells.

tracheids and vessel

The ___ are composed of elongated tubelike structures placed end-to-end. These tubes transport sugars and nutrients.

sieve tubes

The ___ allows further growth of stems and roots by increasing their thickness.

cambium

Gen Chem

Joshua Timbol · 65問 · 2年前

Gen Chem