Biology is a diverse field with many specialized branches that...
Biology92 views·Updated Jun 16, 2026·4 pagesExploring Biology: Branches, Filipino Scientists, and Microscopes
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1
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Branches of Biology and Filipino Scientists
Biology branches into specialized fields that study different aspects of life. Anatomy examines organ structures, while cell biology explores cellular functions. Other major branches include botany (plants), zoology (animals), ecology (organism relationships), genetics (heredity), and physiology (body functions).
The Philippines has produced remarkable scientists who've made global contributions. Fe del Mundo, the first Filipino pediatrician, invented the bamboo incubator and studied infectious diseases. Pedro Escuro developed disease-resistant rice varieties like C4-63 using the Modified Pedigree method. Angel Alcala pioneered artificial coral reefs and discovered over 50 reptile and amphibian species.
Other notable Filipino biologists include Dolores Ramirez (macapuno coconut genetics), Dioscoro Umali , Jose Velasco , and Carmen Velasquez (fish parasites). Their work has advanced fields from marine biology to biochemistry, with practical applications ranging from food security to environmental conservation.
Fun Fact: Carla Lim-Sylianco was the first to report anti-cancer agents in common Filipino foods like ampalaya (bitter melon), malunggay (moringa), and coconut oil!
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of 4
Understanding Microscopy
Microscopes allow us to explore the invisible world, but you need to understand a few key concepts first. Resolution is how clearly you can distinguish between two points in a specimen—essentially the quality of what you're seeing. Magnification is how much larger an object appears compared to its actual size. When using microscopes, remember that as magnification increases, resolution typically decreases (except in scanning electron microscopes).
To calculate the total magnification of what you're viewing, simply multiply the eyepiece magnification by the objective lens magnification. The working distance (space between the objective and stage) is usually 1-2 cm with a low-power objective. When calculating field of view (FOV), you'll need to convert measurements and use specific formulas.
Different microscopes serve unique purposes. The compound light microscope requires mounted specimens and follows opposite movement direction. The stereomicroscope allows observation of unmounted specimens. Phase contrast microscopes reveal transparent specimens, while electron microscopes provide extraordinary magnification—the SEM produces 3D surface images up to 200,000x, and the TEM shows internal structures at up to 500,000x magnification.
Remember: When using a microscope, always start with the lowest power objective and work your way up to higher magnifications after finding your specimen!
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Laboratory Equipment and Safety
Understanding microscope parts is essential for proper use. The eyepiece contains the ocular lens where you look through. The revolving nosepiece holds different objective lenses: the low power objective (10x), high power objective (40x), and oil immersion objective (100x). Focusing happens with the coarse adjustment knob for major movements and the fine adjustment knob for precise focusing.
Laboratory safety requires recognizing hazard symbols. The explosive symbol indicates materials that react violently when heated. Very toxic substances like mercury are harmful even in small doses. Highly flammable materials like alcohol catch fire easily. Corrosive substances like sulfuric acid damage other materials and are dangerous to skin. Biohazard symbols mark infectious substances like blood samples.
Common lab equipment serves specific purposes. A compound microscope magnifies tiny organisms, while a stereomicroscope works for larger specimens. Petri dishes grow microorganisms, test tubes hold small samples, and graduated cylinders measure liquid volumes. For dissection, you'll use tools like scalpels, dissecting scissors, and dissecting pans to examine specimens.
Safety First: Always note the hazard symbols on lab chemicals before using them—these warnings could prevent serious injuries or accidents!
4
of 4
Laboratory Techniques
Proper specimen preparation is crucial for microscopic observation. Wet mounts are used for moist samples like blood or cheek cells, while dry mounts work for specimens like flower petals or insect parts. Knowing which technique to use ensures you'll see your specimen clearly.
Several specialized techniques help biologists analyze samples. Centrifugation separates components by spinning them at high speeds (typically 2,500 RPM), like separating blood plasma from cells. Polymerase Chain Reaction (PCR) creates DNA copies for analysis, which is essential in forensics and genetic research. Agarose Gel Electrophoresis separates DNA fragments by size and is often used after PCR.
Working with microorganisms requires special care. Aseptic technique ensures sterile conditions when culturing bacteria. Autoclaving sterilizes lab equipment by heating it to 120°C, killing all microorganisms. For examining organisms, biologists may use dissection for larger specimens or microdissection for tiny specimens that require microscope assistance during the procedure.
Pro Tip: When preparing slides, always lower the cover slip at an angle to prevent air bubbles from forming in your wet mount preparations!
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Biology92 views·Updated Jun 16, 2026·4 pagesExploring Biology: Branches, Filipino Scientists, and Microscopes
Biology is a diverse field with many specialized branches that help us understand all aspects of life. From tiny cells to entire ecosystems, biology explores how living things function, evolve, and interact. This guide covers the major branches of biology,...
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Branches of Biology and Filipino Scientists
Biology branches into specialized fields that study different aspects of life. Anatomy examines organ structures, while cell biology explores cellular functions. Other major branches include botany (plants), zoology (animals), ecology (organism relationships), genetics (heredity), and physiology (body functions).
The Philippines has produced remarkable scientists who've made global contributions. Fe del Mundo, the first Filipino pediatrician, invented the bamboo incubator and studied infectious diseases. Pedro Escuro developed disease-resistant rice varieties like C4-63 using the Modified Pedigree method. Angel Alcala pioneered artificial coral reefs and discovered over 50 reptile and amphibian species.
Other notable Filipino biologists include Dolores Ramirez (macapuno coconut genetics), Dioscoro Umali , Jose Velasco , and Carmen Velasquez (fish parasites). Their work has advanced fields from marine biology to biochemistry, with practical applications ranging from food security to environmental conservation.
Fun Fact: Carla Lim-Sylianco was the first to report anti-cancer agents in common Filipino foods like ampalaya (bitter melon), malunggay (moringa), and coconut oil!
2
of 4Sign up to see the content. It's free!
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Understanding Microscopy
Microscopes allow us to explore the invisible world, but you need to understand a few key concepts first. Resolution is how clearly you can distinguish between two points in a specimen—essentially the quality of what you're seeing. Magnification is how much larger an object appears compared to its actual size. When using microscopes, remember that as magnification increases, resolution typically decreases (except in scanning electron microscopes).
To calculate the total magnification of what you're viewing, simply multiply the eyepiece magnification by the objective lens magnification. The working distance (space between the objective and stage) is usually 1-2 cm with a low-power objective. When calculating field of view (FOV), you'll need to convert measurements and use specific formulas.
Different microscopes serve unique purposes. The compound light microscope requires mounted specimens and follows opposite movement direction. The stereomicroscope allows observation of unmounted specimens. Phase contrast microscopes reveal transparent specimens, while electron microscopes provide extraordinary magnification—the SEM produces 3D surface images up to 200,000x, and the TEM shows internal structures at up to 500,000x magnification.
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of 4Sign up to see the content. It's free!
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Laboratory Equipment and Safety
Understanding microscope parts is essential for proper use. The eyepiece contains the ocular lens where you look through. The revolving nosepiece holds different objective lenses: the low power objective (10x), high power objective (40x), and oil immersion objective (100x). Focusing happens with the coarse adjustment knob for major movements and the fine adjustment knob for precise focusing.
Laboratory safety requires recognizing hazard symbols. The explosive symbol indicates materials that react violently when heated. Very toxic substances like mercury are harmful even in small doses. Highly flammable materials like alcohol catch fire easily. Corrosive substances like sulfuric acid damage other materials and are dangerous to skin. Biohazard symbols mark infectious substances like blood samples.
Common lab equipment serves specific purposes. A compound microscope magnifies tiny organisms, while a stereomicroscope works for larger specimens. Petri dishes grow microorganisms, test tubes hold small samples, and graduated cylinders measure liquid volumes. For dissection, you'll use tools like scalpels, dissecting scissors, and dissecting pans to examine specimens.
Safety First: Always note the hazard symbols on lab chemicals before using them—these warnings could prevent serious injuries or accidents!
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of 4Sign up to see the content. It's free!
- Access to all documents
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Laboratory Techniques
Proper specimen preparation is crucial for microscopic observation. Wet mounts are used for moist samples like blood or cheek cells, while dry mounts work for specimens like flower petals or insect parts. Knowing which technique to use ensures you'll see your specimen clearly.
Several specialized techniques help biologists analyze samples. Centrifugation separates components by spinning them at high speeds (typically 2,500 RPM), like separating blood plasma from cells. Polymerase Chain Reaction (PCR) creates DNA copies for analysis, which is essential in forensics and genetic research. Agarose Gel Electrophoresis separates DNA fragments by size and is often used after PCR.
Working with microorganisms requires special care. Aseptic technique ensures sterile conditions when culturing bacteria. Autoclaving sterilizes lab equipment by heating it to 120°C, killing all microorganisms. For examining organisms, biologists may use dissection for larger specimens or microdissection for tiny specimens that require microscope assistance during the procedure.
Pro Tip: When preparing slides, always lower the cover slip at an angle to prevent air bubbles from forming in your wet mount preparations!
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