Introduction to biology questions | form one Biology

(1639) Question Category: Short answers

What is laboratory ?

Answer / Solution

A laboratory is a special room in which scientific experiments and specimens are conducted and stored respectively.

(1640) Question Category: Short answers

List five biology laboratory rules.

Answer / Solution

The following are among the rules in biology laboratory;

  1. Turn off gas and water taps when not in use,
  2. Do not burn substances towards other people in the laboratory,
  3. Do not take laboratory equipments, chemicals or specimens out of the laboratory,
  4. Do not play or run in the laboratory,
  5. Read the labels or containers before using the contents. Do not interchange labels.

(1641) Question Category: Short answers

Draw the following apparatus and state their function

  1. Beaker
  2. Bunsen burner
  3. Hand lens

Answer / Solution

The following are descriptions of the stated apparatus;

  1. Beaker: A beaker is a cylindrical glass or plastic container with a flat bottom and a lip. It is used for holding and measuring liquid volumes. Beakers are commonly used in laboratories for mixing, heating, and holding substances during experiments. They come in various sizes and have graduation marks to estimate the volume of liquids.

  2. Bunsen burner: A Bunsen burner is a common laboratory device used for heating substances. It consists of a metal base with a gas inlet and an adjustable air vent, a vertical metal tube, and a burner head with small holes. The gas (typically natural gas or propane) flows through the inlet and mixes with air before being ignited at the burner head. By adjusting the gas flow and the air vent, the Bunsen burner allows precise control of the flame's size and temperature. It is commonly used for tasks like sterilizing equipment, heating solutions, and performing flame tests.

  3. Hand lens: A hand lens, also known as a magnifying glass or a hand magnifier, is a handheld optical instrument used to enlarge and examine objects or details more closely. It typically consists of a convex lens mounted in a frame or handle. The lens magnifies the image of the object placed beneath it, making it appear larger and clearer. Hand lenses are commonly used in scientific observations, fieldwork, and other tasks that require detailed examination of small objects, specimens, or texts.

Please note that these descriptions provide a general understanding of the apparatus and their functions. There may be variations and specific uses for each apparatus depending on the context and the scientific field of study.

(1674) Question Category: Short answers

What is biology?

Answer / Solution

Biology is the scientific study of life and living organisms.

(1908) Question Category: Long answers

Briefly explain why Biologists prefere to use  a light microscope rather than using normal eyes ?

Answer / Solution

Biologists prefer to use a light microscope rather than relying solely on normal eyesight for several reasons:

  1. Magnification and Resolution: Light microscopes have the ability to magnify specimens to a much higher degree than what can be achieved by the naked eye alone. This allows biologists to observe and study microscopic structures and details that would otherwise be invisible. Additionally, light microscopes offer higher resolution, enabling the visualization of finer structures within cells and tissues.

  2. Illumination and Contrast: Light microscopes utilize various illumination techniques, such as brightfield, darkfield, phase contrast, and fluorescence, which enhance the visibility and contrast of the specimen. These techniques help distinguish different cellular components and make them easier to study and analyze. By manipulating the lighting conditions, biologists can highlight specific structures or cellular processes of interest.

  3. Sample Preparation: When using a light microscope, biologists have the opportunity to prepare samples in a controlled manner. They can stain or label specimens with specific dyes or fluorescent markers, enabling the visualization of specific cell structures, molecules, or processes. This staining process enhances the contrast and enables targeted observations and measurements.

  4. Live Observation: Light microscopes are well-suited for observing living organisms and dynamic processes in real time. Biologists can use specialized techniques, such as phase contrast or differential interference contrast (DIC), to visualize living cells without the need for staining or fixation. This allows researchers to study cellular behavior, cell division, movement, and other dynamic processes as they happen.

  5. Quantitative Analysis: Light microscopes can be combined with imaging software and digital cameras, enabling biologists to capture and analyze images in a quantitative manner. This facilitates measurements, counting, and statistical analysis of various biological features or events, providing objective data for scientific research.

In summary, light microscopes offer higher magnification, resolution, illumination control, and sample preparation options compared to relying solely on normal eyesight. They enable biologists to observe and study microscopic structures, perform live observations, and conduct quantitative analyses, making them essential tools in biological research and discovery.

View All Topics
News & Updates | Recently
Recent Updates
questions

2024-05-02: questions

Questions Uploaded on 2024-05-02
questions

2024-03-29: questions

Questions Uploaded on 2024-03-29
questions

2024-03-19: questions

Questions Uploaded on 2024-03-19

Dismissible in 10 seconds