Understanding Sheep Farming: Herd Composition and Practices
Sheep Farming: Herd Composition and Management
Sheep Herd Structure
Ewes (Bellies of the Herd)
- Reproductive females.
- Age: 1.5 years (paddock mated) to 6.5 years (5th breeding).
- Replacement rate: 20% annually.
- Constitute 70-75% of total females in the herd.
Borregas (Breeding Females)
- Breeding females.
- Age: 4-5 months (weaning) to 1.5 years (early races, paddock mated).
- Constitute approximately 20% of total females in the herd.
Rams (Breeding Males)
- Breeding males.
- Age: 1.5 years to 5.5 years.
- Replacement rate:
Photosynthesis, Monera, Protista, Fungi, Plantae, and Animalia Kingdoms
Photosynthesis
In the photosystems, [light energy] is used to form NADPH. In the electron transport chain, the energy of those electrons is used to form ATP. The dark phase occurs independently of light, without using chlorophyll. It takes place in the stroma, and it uses the energy (ATP and NADPH) of the light-dependent phase to fix carbon dioxide and obtain organic molecules. The carbon source is CO2, the source of nitrogen is nitrates and nitrites, and the source of sulfur is sulfates. All this
Read MorePhotosynthesis, Respiration, and Cell Biology: Key Concepts
Where Plants Get Their Mass
Where do plants get most of their mass? The air
Energy Carriers in Photosynthesis and Respiration
Which of the following is NOT an energy carrier involved in either Photosynthesis or Cellular Respiration? G3P
Light Reactions in Photosynthesis
Which of the following are generated by light reactions in photosynthesis? Energy carriers
Location of Photosynthesis Reactions
Where do the light reactions of photosynthesis take place? Thylakoids of the chloroplasts
Where does the Calvin
Read MoreRespiratory System Anatomy: Nose, Larynx, Lungs & Bronchi
Respiratory System Anatomy
Area of Conduct
Formed by a series of interconnected cavities and tubes: nose, pharynx, larynx, trachea, bronchi, bronchioles, and terminal bronchioles. These structures conduct air into the lungs.
Respiratory Tract
The respiratory tract is woven into the lungs where gas exchange occurs, covering the respiratory bronchioles, alveolar ducts, alveolar sacs, and alveoli.
Nose
The internal structures of the nose fulfill these functions:
- Filter, warm, and humidify the incoming air.
Central Dogma, Cellular Respiration, and Genetics
Central Dogma of Molecular Biology
The central dogma of molecular biology illustrates the mechanisms of transmission and expression of genetic inheritance, following the discovery of its coding in the double helix of DNA. It suggests a unidirectional flow of information from genes to proteins. DNA is transcribed into messenger RNA (mRNA), which is then translated into protein, the functional element of the cell. The dogma also states that only DNA can replicate, thus reproducing and transmitting
Read MoreAnatomy of the Medulla, Liver, Kidneys, and Heart
Medulla Oblongata (Brainstem)
The medulla oblongata, or brainstem myelencephalon, is the lowest of the three segments of the brainstem. It is located between the pons (above) and the spinal cord (below). It takes the form of a truncated cone, approximately three inches long. It is bordered by the spinal cord at the decussation of the pyramids (Mistichèlli). The division with the pons is clear and is marked by the pontomedullary sulcus. However, this division is only visible on the anterior and lateral
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