A tubular structure that grows from a pollen grain, enters the embryo sac, and allows the male reproductive cells to move to the ovule is called (a)   .

The process by which one of the two sperm nuclei fuses with the egg nucleus to produce a diploid zygote and the other fuses with the polar nuclei to produce a triploid endosperm is called (a)   .

A (a)   is a female reproductive structure of small nonvascular plants that produce a single egg and in which fertilization and development take place.

The structure that contains the male gametophyte of seeds plants is (a)   .

A type of asexual reproduction in which new plants grow from nonreproductive plant parts is called (a)   .

In a flower, one of the outermost rings of modified leaves that protect the flower bud is called (a)   .

The part of a pistil that produces eggs in ovules is (a)   .

The technique for growing living cells in an artificial medium is called (a)   .

The protective outer covering of a seed is (a)   .

A structure in the ovary of a seed plant that contains an embryo sac and that develops into a seed after fertilization is called (a)   .

A reproductive structure that produces male sex cells in flowerless and seedless plants is called (a)   .

The female reproductive part of a flower that produces seeds and consists of an ovary, style and stigma is called (a)   .

The transfer of pollen from the male reproductive structures (the anthers) to the tip of a female reproductive structure (the pistil) of a flower in angiosperms or to the ovule in gymnosperms is known as (a)   .

The practice of reproducing plants from seeds or from vegetative parts is called (a)   .

In flowering plants, the tip of a stamen, which contains the pollen sacs where grains form, is called (a)   .

A cluster of spores or sporangia.

(a)  

The embryo leaf of a seed.

(a)  

The male reproductive structure of a flower that produces pollen and consists of an anther at the tip of a filament.

(a)  

The tissue that conducts food (sugars, amino acids and mineral nutrients) in vascular plants.

(a)  

The tissue that transports water that make it possible for vascular plants to grow to great heights.

(a)