Semester 2 exam 2024

Question 1

What is Ethylene

Answer 1

Ripening of fruit, release of dormancy, stimulates shoot root growth, Stimulates leaf abscission.

Question 2

.001, h+, ph 3 t/f ?

Answer 2

True- .001 1 over 10x10x10
10 to the power of negative 3 (-3) = pH 3 h+ irons

Question 3

What is Cytokines

Answer 3

Controls major growth periods of the plant linked to ethylene to control obsession flowers/ leaved fruit

Question 4

What is the Stigma

Answer 4

Female part of slower top of pollen receptacles become style leads to ovary

Question 5

What is the Pistil

Answer 5

Femail colective petles of flowers

Question 6

What is the Arthur/Filament

Answer 6

Pollen producers stamen

Question 7

What is Photosynthesis

Answer 7

6 CO2 + 6H2O ——–> C6 H12 O6 + 6O2

Question 8

What is Structure soil

Answer 8

Percentage sand, silk, clay

Question 9

What is Nitrogen

Answer 9

Macro - involved in cell function diction, protein synthesis, photosynthesis transfer of energy

Question 10

Whats is Epigeal Germination

Answer 10

Cotyledons pushed above soul line until photosynthesis provided energy for the plant by itself.

Question 11

What is Habitability

Answer 11

P=G+E
30% Genetics
70% environment

Question 12

What is Sperm morphology

Answer 12

Motility
LDR
Amount of sperm
Quality of the sperm
Any dis functions

Question 13

What is Environment / management

Answer 13

Can influence phenotype. Eg: supplementary flooding, temperature, vaccination, irrigation and windbreak.

Question 14

What is Protein

Answer 14

Crude
NPN

Question 15

What is Temperature a big influence on

Answer 15

Gonadotrophin released controlled by hypothalamus

Question 16

Name the key player in ruminant and protein digestion.

Answer 16

These cud-chewing mammals have four chambers of stomachs used for their digestion. These species obtain their nutrition from plant products by adapting to a certain process called rumination.

Question 17

Explain the influence is the anatomy of a mono gastric ?

Answer 17

Monogastric digestive systems begin with the in- gestation of food into their mouth. The tongue and the teeth gather feed and break it down into smaller pieces in order to make it easier for the animal to digest. Food travels down the oesophagus, which is a long tube that carries the feed from the mouth to the stomach.

Question 18

The rum-en is a fermentation tank: Explain the design / operation of this tank?

Answer 18

The rumen, a crucial part of the digestive system of ruminant animals such as cows, sheep, and goats, acts as a natural fermentation tank. Understanding its design and operation provides insight into how these animals efficiently digest fibrous plant materials

Question 19

Na HCO3

Answer 19

NaHCO₃, commonly known as sodium bicarbonate or baking soda

Question 20

The “ Bomb callory defficate

Answer 20

A bomb calorimeter is a device used to measure the heat of combustion of a particular reaction

Question 21

Protein digestion

Answer 21

When protein is digested it is broken down into peptides which then become NH4+ and NH3-

Question 22

2 types of protien are ?

Answer 22

Crude and NPN

Question 23

NPN is?

Answer 23

Non protein digestion

Question 24

Rumen microbes

Answer 24

Major source of protein in a bovines diet, breaks down CP NPN to NH4+ NH3-

Question 25

Microbes role

Answer 25

Break down protein . Continuously flushes from the rumen to omasum to abomasium are then absorbed.

Question 26

Calories/kilojoules

Answer 26

Formula: Multiply the energy value by 4.184

Question 27

N fixation refers to

Answer 27

N2 Gas fixed to an available form converted to NH3-

Question 28

Ice-cream form refers to what ?

Answer 28

N
NO2
NH4+
NO3-

Question 29

Recitations consists of ?

Answer 29

AIR 78%N
Rain consists N

Question 30

Ammonification is?

Answer 30

N is present in the soil but in a complex form / toed to organic matter and compounds

Question 31

Notrosamanus and nitrobacter are…?

Answer 31

Bactria responsible

Question 32

Denitrification

Answer 32

waterlogged soils