Plant and Animal Nutrition
Plant Nutrition
Bryophyte Nutrition
Seedless plants are small and have a thallus organization. Although they have colonized the terrestrial environment, they lack true roots for water and mineral absorption, and vascular tissue for transport.
Cormophyte Nutrition Process
- Absorption of water and minerals by roots (root hairs are coated in a piliferous layer).
- Transportation of xylem sap.
- Gas exchange (carbon dioxide and oxygen).
- Transportation of phloem sap.
Xylem Transport
Water and mineral salts enter
Read MoreMicrobiology: Bacteria, Viruses, and Eukaryotes
Item 21
1. Concepts and Types of Organisms
Organisms, often only visible with a microscope, are classified as prokaryotic or eukaryotic, and unicellular or multicellular. Depending on their nutrition type, they are divided into prokaryotes (archaebacteria, eubacteria—Kingdom Monera) and eukaryotes (algae, protozoa, fungi—Kingdom Protista). Viruses are not considered living organisms.
2. Viruses
Viruses are simple, microscopic particles formed by DNA or RNA and surrounding proteins. Free viruses
Read MoreSeed Plants: An In-Depth Look at Spermatophytes
Spermatophytes: The Seed-Bearing Lineage
Spermatophytes are a monophyletic group encompassing all vascular plants that produce seeds. The term originates from the Greek words “sperma” (seed) and “phyton” (plant), translating to “seed plants.” This group aligns precisely with the traditional classification of flowering plants, as the pollen grain in seed plants generates a pollen tube to reach the ovum, facilitating fertilization.
Gymnosperms: Vascular Plants with Naked Seeds
Gymnosperms are vascular
Read MoreAnimal Physiology: Key Mechanisms and Systems
Osmoregulation and Excretion
Osmosis and Water Balance
Osmosis is the movement of water across a semipermeable membrane from an area of low solute concentration to an area of high solute concentration. Excretion is the process of removing metabolic wastes and toxins from the body. Animals employ different strategies to maintain water balance:
- Osmoconformers: These animals, like jellyfish, maintain an internal osmolarity similar to their environment.
- Osmoregulators: These animals, like humans, actively
Organ Transplantation and Assisted Reproduction
Transplantation
Transplanting: Replacement of a diseased organ or tissue that endangers a person’s life. Donor: Usually a deceased person (brain dead) or a living person. Spanish Legislation: 1. Defines brain death as a scientific, legal, and ethical concept. 2. Respects the deceased’s will regarding donation. 3. Death diagnosis is made by an independent medical team. 4. Ensures altruism and non-commercialization. 5. Guarantees donor anonymity. 6. Applies medical criteria for organ distribution.
Types
Read MoreCell Biology Fundamentals: Proteins, Lipids, and Nucleic Acids
1. Peptide bond links amino acids together to form proteins.
2. Triglycerides are composed of one molecule of glycerol and three fatty acids.
3. The primary structure of a protein is the unique sequence of amino acids.
4. DNA and RNA are types of nucleic acids.
5. Matthias Schleiden and Theodor Schwann are known for articulating the cell theory.
6. The mitochondrion is an organelle that functions as the site of energy production in eukaryotic cells.
7. A nucleotide is made up of a sugar, a phosphate group,
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