Test Compilation BIO 102 6

Study Summary: Biology Concepts

This summary compiles key biological concepts derived from the provided questions and their correct answers, covering various aspects of plant biology, animal biology, microbiology, and general biological principles.

I. Plant Biology

A. Photosynthesis

• Requirement: Carbon dioxide (CO2) is an essential requirement for photosynthesis.
• End-products: The end-products of photosynthesis are sugars and oxygen.
• Autotrophic Plants: Autotrophic plants produce their own food through photosynthesis.
• Chemosynthetic Nutrition: A type of autotrophic nutrition where primitive autotrophic prokaryotes use chemical (glycolytic) energy to make carbohydrates from H2S and CO2.

B. Plant Structure & Growth

• Primary Growth: The Apical meristem is the part of the plant responsible for primary growth.
• Cell Structure: A plant cell can be distinguished from an animal cell by its rigid cell wall.
• Growth Definition: The irreversible increase in size and mass in plants is called growth.

C. Plant Reproduction

• Anther Structure: Each anther is typically made up of 4 pollen sacs in which pollen grains grow and develop.
• Pollination: Involves the transfer of pollen from the anther to the stigma.
• Spore Production: Land plants produce both microspores and megaspores.
• Monoecious Plants: Plants having both male and female sporangia are called monoecious.
• Reproduction Methods: Both sexual and asexual reproduction methods are possible in plants.
• Modified Stems: Rhizomes are modified underground stems used for asexual reproduction.
• Male Gamete: In plants, the male gamete is the antheridium.

D. Plant Physiology

• Plant Hormones: Auxin is the plant hormone primarily responsible for cell elongation.
• Phototropism Discovery: Boysen-Jensen demonstrated that a chemical signal travels from the tip to the growing region in phototropism.

E. Plant Kingdom Characteristics

• The Plant Kingdom encompasses a wide range of forms, from microscopic algae to flowering trees.
• Motility: In terms of motility, plants are generally sedentary.
• Flower Parts: The Androecium (the collective term for stamens) is a part of a flower. The style is to the carpel what the filament is to the stamen (both support their respective reproductive structures).

II. Animal Biology

A. Animal Characteristics & Classification

• General Trait: All animals are multicellular.
• Symmetry: Sponges are a group of animals that do not have symmetry.
• Cephalization: Sea anemones are animals in which cephalization does not occur.
• Diploblastic Animals: Porifera (sponges) are an example of a diploblastic animal.
• Segmentation: Phylum Cnidaria (e.g., jellyfish, sea anemones) does not have segmentation.
• Digestive Tracts: Sponges are animals that do not have digestive tracts.

B. Animal Nutrition & Digestion

• Nutritional Mode: Animals are heterotrophic (they are not autotrophic).
• Purpose of Food Intake: Animals take in food to provide energy, as raw material for building, and for growth. "Maintenance of poor health and reproduction" is NOT a reason.
• Protein End-product: The end product of proteins (after digestion) is amino acids.

C. Animal Respiration & Circulation

• Respiratory Organs: Lungs, gills, and spiracles are organs of respiration. The liver is NOT an organ of respiration.
• Vertebrate Circulation: Vertebrate circulation is characterized as closed circulation.
• Airway: The pharynx is NOT part of the lower airway of the lung (trachea, alveoli, and bronchioles are).

D. Animal Reproduction & Development

• Embryo Protection: The main purpose of protecting the embryo is to avoid desiccation (drying out).
• Zygote Formation: A zygote is a product of gametes fusion.

III. Microbiology & Virology

A. Viruses

• Antiviral Drugs: Examples of antiviral drugs include Acyclovir, Oseltamivir, Remdesivir, and Antiretrovirals.
• Viral Families: Human herpesvirus 1 belongs to the virus family Herpesviridae.
• Lytic Cycle: The term "Lytic" refers to the process of immediate replication and destruction of the host cell by a virus.
• Horizontal Gene Transfer (HGT): In the context of viruses, HGT can involve the integration of viral DNA into the host genome (prophage).
• Challenges in Study: A challenge in studying viruses is their tendency for immediate replication and destruction of the host.
• Vaccines: Types of vaccines include Live attenuated, Inactivated, Subunit, and mRNA vaccines.

B. Microorganisms

• Major Groups: Major groups of microorganisms include Fungi, Viruses, and Bacteria. Plants are NOT considered a major group of microorganisms.
• Bacterial Phyla: Examples of major bacterial phyla include Proteobacteria and Firmicutes.

IV. General Biology Concepts

• Nutrition (General): Nutrition refers to the total of all processes related to the conversion of raw foodstuff, providing energy, and enabling an organism to receive necessary food. "The process of photosynthesis by which green plants digest food" is NOT a correct definition of nutrition.