Notes (mix)

Question 1

Microbes contribute nutrients to the soil. The more microbes, the ________ the soil

Answer 1

richer

Question 2

ammonium is absorbed in form of:

Answer 2

1. fertilizer (urea)
2. Ammonium sulfate ((NH₄)₂SO₄)
3. ammonium nitrate (NH₄NO₃)

Question 3

bacterium found in soil that help in fixing nitrogen in leguminous plants

Answer 3

Rhizobium

Question 4

Plants have preference for N2 in form of ________

Answer 4

ammonium nitrate

Question 5

2 ways to fix nitrogen

Answer 5

• lightning
• production of nitrogen

Question 6

NPK fertilizer nutrients

Answer 6

1. Nitrogen
2. Phosphorus
3. Potassium

Question 7

a major plant growth hormone of the auxin class, affecting cell enlargement, and differentiation.

Answer 7

Indoleacetic Acid (IAA)

Question 8

converts Fe bound to proteins or water-soluble compounds into a form accessible to microorganisms

Answer 8

Siderophore

Question 9

neutralizes acid in soil

Answer 9

limestone

Question 10

What causes high acidity in soil?

Answer 10

Heavy fertilization

Question 11

this disease caused by a fungi occludes banana xylem and causes water to not reach leaves, leaving them to wilt

occlude= block, obstruct

Answer 11

Fusarium

caused by fungi Fusarium oxysporum f. sp. cubense (Foc).

Question 12

commonly used as a vector for the introduction of foreign genes into plants and consequent regeneration of transgenic plants.

vector= a DNA molecule (often plasmid or virus) that is used as a vehicle to carry a particular DNA segment into a host cell as part of a cloning or recombinant DNA technique.

Answer 12

Agrobacterium tumefaciens

Question 13

• most commonly used biological pesticide worldwide
• has inactive toxic that can only be activated by alkaline environment

Answer 13

Bacillus thuringiensis (BT)