1. the idea that the sporophyte generation and the gametophyte generation follow one another in alternating fashion alternation of generations
2. the process of changing cells or organisms from a generalized to a more specific or specialized condition; often involves a reduction of the ability to reproduce or divide and is usually not reversible meristem
3. beginning period of growth of a seed or spore; to sprout differentiation
4. the youthful, undifferentiated cells of root and shoot tips and other plant parts that produce new cells for growth vascular cambium
5. a plant that continues to grow year after year from the same plant body perennial
6. above ground part of a plant; leaves, stems, flowers, fruits, etc. shoot
7. the meristematic cells that produce new cells, increasing plant body girth; often forming a ring only several cell layers wide in woody stems and roots germination

1. Alternation of generations

2. Differentiation

3. Germination

4. Mersitematic cells or Meristem (tissue)

5. Perennial

6. shoots

7. Vascular Cambium

Explanation:

Alternation of generations is a process in the life cycle of a plant and even algae. The alternation part occurs between the sporophyte and gametophyte. A sporophyte is formed when two haploid gametes come together forming a diploid zygote. When the sporophyte matures, it will eventually gain a reproductive organ that would release spores that are haploid spores. These spores become gametophytes. When these gametophytes start to pair up, they become sporophytes. So the cycle begins again.

The meristem is a tissue that is made up of cells called merstematic cells. They produce undifferentiated cells which can specialize into other cells to serve different purposes. Meristems are usually found in areas of the plants that grow.

Perennial means "through the years," and so they are plants that are expected to live a long life, often more than two years. These plants can grow out again from the same roots after they die, so you do not need to replant them.

The growth that starts from the seed that goes in the upwards direction is called shoots, while the growth that goes downwards are called roots. Shoots are the starting point of the growth of the different parts of the plant that are above the ground, like the stem, leaves and the like.

Differentiation is a process where cells start to acquire specific traits to do specific and different functions. Some of the cells that differentiate will not be able to reproduce new ones, some of them die, and the others skip the mitosis stage.

Germination occurs mostly in plants. It is the growth of an organism that starts from a dormant state or a seed.

As plants grow taller, they also grow wider. The vascular Cambium produces undifferentiated cells that form the bark and the woody cells which increases the girth or the wideness of the plant.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

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