Test Compilation BIO 102 11

Comprehensive Biology Study Summary

This summary compiles key biological concepts and facts presented in the provided quiz questions, organized into major topics for effective study.

I. Plant Biology

A. Plant Reproduction

• Monoecious Plants: Plants having both male and female sporangia (reproductive structures) on the same plant.
• Dioecious Plants: Plants where male and female reproductive structures are borne on different individual plants.
• Anther Structure: Each anther typically consists of four pollen sacs (microsporangia) where pollen grains grow and develop.
• Pollination: Involves the transfer of pollen from the anther to the stigma.
• Autogamy: The process where pollen from an anther is transferred to the stigma of the same plant (self-pollination).
• Seed Development: After fertilization, the ovule develops into the seed.
• Asexual Reproduction in Plants:
  • Potatoes reproduce asexually using tubers.
  • Budding is an example of asexual reproduction in plants.
  • Rhizomes are modified underground stems used for asexual reproduction.
• Sexual and Asexual Reproduction: Both sexual and asexual reproduction methods are possible in plants.
• Sexual Reproduction in Plants: Occurs through the formation of gametes.
• Female Reproductive Part of a Flower: The Pistil (comprising stigma, style, and ovary).

B. Plant Anatomy & Growth

• Calyx: Composed of structures known as sepals.
• Corolla: Composed of structures known as petals.
• Primary Growth: The Apical meristem (found at root and shoot tips) is responsible for primary growth.
• Plant Growth Definition: An irreversible increase in mass and sizes.
• Plant Kingdom Scope: Encompasses a wide range of forms, from microscopic algae to flowering trees.
• Plant Cell Distinction: Plant cells can be distinguished from animal cells by the presence of a rigid cell wall.
• Plant Motility: Plants are generally sedentary.
• Evolutionarily Related Plant Groups: Include Bryophytes, Gymnosperms, and Angiosperms.

C. Photosynthesis & Nutrition

• Photosynthesis End-products: Sugars and oxygen are the end-products.
• Carbon Dioxide Requirement: Carbon dioxide is required for photosynthesis.
• Autotrophic Plants: Produce their own food through photosynthesis.
• Nutrition (Incorrect Definition): The process of photosynthesis by which green plants digest food materials and assimilate it into their system is NOT a definition of nutrition. Photosynthesis is food *production*, not digestion in the heterotrophic sense.

D. Plant Hormones & Tropisms

• Phototropism: The bending of a plant towards light is caused by more growth on the shaded side (due to auxin).
• Phototropism Experiment: In Darwin's experiment, the tip of the coleoptile was covered to stop phototropism.
• Cell Elongation: Auxin is the plant hormone primarily responsible for cell elongation.
• Seed Dormancy: Abscisic acid promotes seed dormancy.
• Boysen-Jensen's Contribution: Demonstrated that a chemical signal travels from the tip to the growing region in phototropism.

II. Animal Biology & Physiology

A. Animal Classification & Characteristics

• Triboblastic Animals: Most animals are triboblastic in their embryonic stages, except Porifera (sponges), which are diploblastic.
• Poriferans (Sponges):
  • Do not have locomotory organs; they are sessile.
  • Lack symmetry (asymmetrical).
  • Do not have digestive tracts; they perform intracellular digestion.
• Cephalization: Occurs in most animals, except jellyfish (which exhibit radial symmetry).
• Endoskeleton: Dogs (vertebrates) have an endoskeleton.
• Animal Kingdom Characteristics (Except): Members of the animal kingdom do NOT possess a cell wall. They are multicellular, heterotrophic, and eukaryotic.

B. Animal Nutrition & Digestion

• Fluid Feeders (Not): A frog is NOT a fluid feeder (it's a carnivorous predator). Mosquitos, aphids, and leeches are fluid feeders.
• Heterotrophic Nutrition (Saprotrophic): Food obtained by absorption through cell or body surface from dead organic material.
• Frugivorous: Heterotrophs that feed mainly on fruits.
• Flukes and Leeches: Use an oral sucker to acquire food.
• Herbivorous Mammals Dentition: In herbivorous mammals (like ruminants), the upper incisors have been replaced with a horny pad.
• Purpose of Food Intake (Not): Animals do NOT take in food for the maintenance of poor health and reproduction.

C. Animal Circulation

• Circulation Components (Not directly associated with): Among the options, the liver is the least directly associated with circulation as a primary circulatory organ, compared to blood vessels, heart, and lungs.
• Oxygenated Blood Flow: Oxygenated blood goes to the heart through the pulmonary vein, and the heart pumps it throughout the body.
• Coronary Circulation: Provides blood supply to the muscles of the heart.
• De-oxygenated Blood Flow: Pulmonary circulation occurs when de-oxygenated blood is pumped away from the heart to the lungs.
• Closed Circulatory System: In vertebrates, blood returns to the heart without leaving the system of tubes; this is called a closed circulation.
• Open Circulatory System: A mollusc (many species) possesses an opened circulatory system.

D. Animal Respiration

• Respiratory System Function: Essential for providing oxygen needed for cellular functions and removing carbon dioxide, a waste product of metabolism.
• Upper Airway (Not included): The bronchi are part of the lower airway, not the upper airway of the lung (which includes the nose, sinuses, pharynx).
• Lower Airway (Not included): The pharynx is part of the upper airway, not the lower airway of the lung (which includes bronchioles, trachea, alveoli).
• Tracheal System: The respiratory system in insects is called the tracheal system.
• Book-lung: A type of respiratory organ used for atmospheric gas exchange, found in arachnids such as scorpions and spiders.

III. Microbiology (Viruses & Bacteria)

A. Virus Structure & Classification

• Virus Classification Feature: Symmetry types (e.g., icosahedral, helical) are characteristic features used in virus classification.
• Herpesviridae: Human herpesvirus 1 belongs to the virus family Herpesviridae. The suffix "-viridae" denotes a viral family.
• Viral Species: Human herpesvirus 1 is an example of a viral species.
• Viral Genus: Simplexvirus is an example of a viral genus.

B. Viral Replication Cycles

• Lytic vs. Lysogenic Cycles (Bacteriophages):
  • Lytic: Immediate replication and destruction of the host cell.
  • Lysogenic: Integration of viral DNA into the host genome (forming a prophage).
• Prophage (Lysogenic): The term for a virus that integrates its DNA into the host genome.

C. Antiviral Agents

• Antiviral Drugs: Acyclovir, Oseltamivir, Remdesivir, and Antiretrovirals fall under the category of Antiviral Drugs.

D. Bacterial Reproduction

• Binary Fission: A method of bacterial reproduction.
• Horizontal Gene Transfer: The integration of viral DNA into host genome (prophage) is an example of horizontal gene transfer.

IV. Cell Biology & Biochemistry

• Eukaryotic Cells: Cells with a nucleus and other membrane-bound organelles.
• Carbohydrates: The end products of this food class are glucose, fructose, and galactose, which can be assimilated into the body system.
• Lipids: One molecule of glycerol condenses with three molecules of fatty acids to form a triglyceride.
• Vitamins: Vitamin B is NOT a fat-soluble vitamin (it is water-soluble). Vitamins A, D, E, and K are fat-soluble.

V. General Biology Concepts

• Sexual Reproduction: Requires two organisms (though self-fertilization exists, the fundamental concept involves the fusion of genetic material from two sources).
• Asexual Reproduction (Not): Fertilization is NOT a method of asexual reproduction.
• Cellular Needs: Every cell in the body needs to receive oxygen and nutrients.
• Microorganisms (Not a major group): Plants are NOT typically considered a major group of microorganisms in the context of their roles alongside viruses, fungi, and bacteria.