No skeletal muscle can contract without first:

a. receiving a hormone signal.

b. checking on the status of nearby skeletal muscles.

c. lining up its actin and myosin filaments.

d. receiving a nervous system signal.

e. linking to a bone.

In all angiosperms, a growing embryo is first surrounded by a _______, which will serve to _______ the embryo until it germinates in the ground.

Fruit can be defined as the mature _______ of an angiosperm. Fruit in this sense lies outside the _______ that surrounds the angiosperm embryo.

The plants with which we’re familiar, such as maple trees, do not produce gametes (eggs and sperm), but instead produce _______, making them the _______ generation of plants. This generation alternates with the _______ generation, which on the male side consists of _______ and on the female side consists of small collections of cells, each one of which is known as a(n) _______.

For a new generation of sporophyte plant to be produced, _______ from one plant must land on the _______ of a plant, a necessary step in allowing the fusion of ______ with _______ that will bring about reproduction.

One of the fertilizations in double fertilization produces a ______, which is the original cell in the new generation of ______ plant. The other fertilization produces ______ in the form of the tissue called _______.

The water-conducting portions of xylem are made up of two kinds of cells, _______ and _______.

The transpiration that moves water through xylem is ultimately powered by _______.

To move dissolved sucrose through phloem, a plant must first _______ sucrose into _______ cells. This produces an osmosis that results in a fluid _______ that transports the sucrose.

Unlike the case with animals, plant growth comes only at ______ of roots and shoots and can go on ______.

Everything in the plant ultimately develops from ______ tissue, through collections of this tissue known as ______.