Bio

• To a great extent we owe our daily high standard of living to biological advances in two areas: food production, disease control
• Biology is a very fundamental and important science dealing with bacteria, protista, fungi, plants, animals including humans
• The structures and functions of are associated with one another in their respective environments
• Biology


  The study of living things
• A large variety of living things exists on the land, in the water, and in the air
• Biology deals with the study of all organisms that live or have ever lived on the earth
• Biology is the study of all organisms
• Importance of Biology in everyday life


  • Biology is very fundamental and important
  • It is the science dealing with bacteria, protists, plants, animals, and humans
  • Organisms are associated with each other in their respective environments
• We owe our daily high standard of living to biological advances in two areas: food production and disease control
• Plant and animal breeders


  Have modified organisms o yield greater amounts of food
• Plant and animal breeders have modified organisms to yield greater amounts of food than did older varieties
• Biology


  The study of living things
• Who is the instructor in the biology class video?

  Miss Angus
• What is the main topic of the video presented by Miss Angus?

  Plant organs
• Why should students watch the video on plant tissues before this video?

  To understand the functions and structures of plant tissues necessary for learning about plant organs
• What are the two major systems of a plant?

  • Shoot system (above ground)
  • Root system (below ground)
• What is the function of the shoot system in plants?

  It includes structures such as leaves and stems
• What does the root system consist of?

  Roots and root hairs
• Why is it important to understand the difference between plant organs above and below ground?

  Because certain structures or tissues have different roles depending on their location
• What are the three main types of plant tissues discussed in the video?

  • Dermal tissues
  • Vascular tissues
  • Ground tissues
• What is the role of dermal tissues in plants?


  They cover the outside of the plant
• What are the two types of vascular tissue?

  Xylem and phloem
• What is the primary function of xylem in plants?

  To transport water
• How does phloem function differently from xylem?

  Phloem transports food in both directions, while xylem transports water upwards only
• What are the three major categories of ground tissues?

  • Parenchyma
  • Collenchyma
  • Sclerenchyma
• What is the function of parenchyma tissue?

  It serves as packaging tissue
• What is the role of collenchyma tissue in plants?

  It provides structural support but is not as hard and rigid
• What is sclerenchyma tissue known for?

  It is very hard connective tissue with thickened cell walls
• What must students know about the tissue types in plant organs?

  • Dermal tissue present
  • Vascular tissue present
  • Ground tissue present
  • Variations from organ to organ
• What is the primary function of leaves in plants?

  They trap sunlight for photosynthesis
• What is the cuticle's main function in leaves?

  Waterproofing to prevent water loss
• What is the role of the epidermis in leaves?

  It acts as a protective barrier
• What are the two types of cells found in the mesophyll of leaves?

  Palisade cells and spongy cells
• Why are palisade cells stacked in a certain way?

  To maximize the number of cells next to each other for sunlight absorption
• What is the function of spongy mesophyll cells?

  They facilitate water evaporation and gas exchange
• What do xylem and phloem transport in leaves?

  Xylem transports water, and phloem transports products of photosynthesis
• What is the function of stomata in leaves?

  They allow gases and water to leave the leaf
• What are the main characteristics of dicot stems?

  • Cross-section is cylindrical
  • Contains vascular bundles arranged in a circle
  • Has an epidermis and cortex
• What is the role of the epidermis in stems?

  It provides protection and may contain chloroplasts
• What is the function of the cortex in stems?

  It serves as the filling of the stem