What is an embryo in zoology and botany?

What is the fetus? This term can occur both in zoology and in botany. Now a little more about each.

Zoology

In this section, the embryo is an embryo. What is the fetus? Let's analyze the example of a hen and an egg. Where does the development of the embryo begin? From the moment of fertilization. In this case, the yolk enters the oviduct. Then, twenty hours later, when the egg was dressed in all the shells, an embryo was formed inside, the chicken would carry it away.

Note that in order for the chicken to appear, it is necessary to maintain a constant egg temperature (forty degrees). The embryo is alive for no more than three weeks, if during this period the chicken does not hatch, then the fetus dies. How to keep the right temperature? For this, there are artificial devices or the hen-hen itself, which will incubate eggs before the birth of offspring.

Botany

What is an embryo in botany? As in zoology, it can be called an embryo, which resulted from the fusion of two gametes (male and female) during sexual reproduction. In higher plants, the embryo is the rudiment of asexual sporophyte.

Structure

So, what is the embryo of the plant, figured out, now a little about the structure. It consists of several parts:

• The spine, from which the main root will later develop.
• The embryo stem is the part of the plant that we first see on the surface of the soil when the seed germinates.
• The kidney from which the escape occurs.
• Cotyledons are the first leaves of a plant that begin their development in seed. Typically, these leaves are different from those that will be in an adult plant. In this case, the difference can be found not only in form and structure, but also in functions.

How germination occurs

Germination is possible only when certain conditions are reached. To develop the body requires enough heat, light and moisture. Due to the activity of the cells of the future plant, the development of the basic organs begins in the seed. The first appears root, which strengthens the seed in the soil. Then the stem develops, after which the cotyledons begin their development. If the previous steps in all plants proceed in the same way, then the development of the cotyledon is different for all. They can remain underground and perform the function of enrichment with nutrients, and can be carried to the surface together with the stem and perform the function of the first leaves, that is, to engage in photosynthesis.

After that, the main leaves begin to develop, the root, which together with all branches forms the root system. Appear internodes and subordinate roots.