1. inner layer of cells surrounding the vascular tissue in plants guard cells 2. a root system of many similar-sized branches of roots solar tracking 3. cells that form the opening of stomata fibrous root system 4. a biogeochemical cycle of earth that recycles nitrogen in the air and soil and to and from living organisms taproot 5. the intake of oxygen and release of carbon dioxide by living organisms respiration 6. a behavior of some plants in which they readjust their positioning to follow the sun nitrogen cycle 7. a root system of one, long, main root that goes straight down into the ground; may have small lateral roots extending from it endodermis

1.

Endodermis

Explanation:

Endodermis is the innermost layer of cells in a root and it selects what gets into the plant from the soil. The endodermis has modified parenchyma cells that are alive at maturity and function in storage and photosynthesis

2.

Fibrous root system

Explanation:

A fibrous root system is mainly found in the monocotyledonous plants and ferns. The plants use the roots to absorb water and mineral salts from the soil. The roots are thin and has some branching roots growing on the stem. The fibrous roots mostly grow fairly to the surface of the ground and anchors the plant to the top soil preventing erosion.

3.

Guard cells

Explanation:

Guard cells surround the stomata thus they do take role in transpiration by opening and closing of stomata.When the stomata is closing the guard cells shrink in size because the potassium ions move out of the vacuole and out of the cells and they are followed by water thus the stomata close.When the stomata is opening the guard cell expand and this Is caused by potassium ions moving into the vacuoles and water moves into the vacuoles following the potassium ions thus the stomata opens

4.

Nitrogen cycle

Explanation;

Nitrogen cycle is the process by which nitrogen in the atmosphere is converted into a useful form that take part in biological processes. Some of the processes involved in the nitrogen cycle are denitrification, nitrification, ammonification, fixation. The nitrogen cycle favors a stable growth of plants.

5.

Respiration

Explanation:

Respiration is the process by which organic food molecules such as glucose, fructose, are broken down in the presence of oxygen gas to generate energy in form of ATP and also produce water and carbon dioxide as byproducts.  Cellular respiration is an important process as it generates energy that helps the cell drive its processes such as transport and growth and development.  

6.

  Solar tracking

Explanation:

Solar tracking system enables the plants to collect maximum energy from the sun energy with maximum efficiency and in a modified manner with the help of linear actuators thus increasing the production of plants. The solar trackers are fitted with solar panels that undertake the action of absorbing sunlight energy which converted is into useful end products through photosynthesis to make glucose and oxygen gas.

7.

Tap root system

Explanation:

A taproot grows straight vertically into the soil. In most plants its thick for it is used to store food and at the same time provide anchorage. It is mainly found in two classes of plants that is the cotyledons and gymnosperms. It has a few side roots called lateral roots. A taproot can grow deep into the soil hence it absorbs water and mineral salts easily.