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Unit notes and practice questions

Grade 10 Biology unit 1: Sub-Fields of Biology

Everything here is for unit 1 of the Grade 10 Biology textbook: what the chapter covers, the short notes, practice questions with their answers, and the lesson video where one exists.

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3
Cards
10
Practice questions on unit 1
1–16
The textbook pages for unit 1

What unit 1 covers

  1. 1.Pure and applied fields of biology
  2. 2.Major discoveries in Biology and applied
  3. 3.The contributions of biological discoveries
  4. 4.Major discoveries by Ethiopian Biologists ies to society/environment e.g. microscope, peni

Short notes for unit 1

The cards filed under this chapter on the Grade 10 Biology page. Open one at a time.

ScientistMajor Discovery
Antonie van LeeuwenhoekImproved lens microscopy, discovered bacteria and cell vacuole
Carl LinnaeusClassification hierarchy and binomial naming system
Gregor MendelLaws of inheritance, dominant and recessive gene concepts
Louis PasteurGerm theory, pasteurization, rabies and anthrax vaccines
Robert KochDiscovered causative agents of tuberculosis, cholera, and anthrax
Watson and CrickDouble helix model of DNA structure
Wilmut and CampbellCloned first mammal, Dolly the sheep, by nuclear transfer

When you use it

Use for matching major biological discoveries, inventions, and theories with their respective pioneers.

Watch out

Pasteur proved the germ theory and developed rabies vaccines, whereas Koch specifically identified the causative bacteria of tuberculosis, cholera, and anthrax.

Drafted from Grade 10 Biology, pages 1-16, then checked twice before it went up

ScientistKey Contribution
Prof. Yalemtsehay MekonnenPesticide hazard assessment and medicinal properties of plants like Moringa stenopetala
Dr. Aklilu LemmaDiscovered Endod (Phytolacca dodecandra) berries as a cheap molluscicide against schistosomiasis snails
Prof. Gebissa EjetaBred drought-tolerant and Striga-resistant hybrid sorghum, awarded 2009 World Food Prize

When you use it

Use when answering questions on Ethiopian scientists and their contributions to medicine, agriculture, and health.

Watch out

Dr. Aklilu Lemma discovered Endod as a molluscicide to kill host snails, not a direct drug injected into humans.

Drafted from Grade 10 Biology, pages 1-16, then checked twice before it went up

Sub-branchFocus of Study
MorphologyExternal form and structure of organisms
AnatomyInternal bodily structure revealed by dissection
HistologyMicroscopic structure of tissues
CytologyStructure and function of cells
PhysiologyNormal life processes and functions of organs
EmbryologyDevelopment from zygote to fully formed embryo
TaxonomyIdentification, naming, and classification of organisms
PaleontologyFossils and organisms of the past

When you use it

Use when identifying or defining the core branches of biology based on the structures or life processes they investigate.

Watch out

Do not confuse cytology (study of single cells) with histology (study of tissues) or anatomy (gross organ structures revealed by dissection).

Drafted from Grade 10 Biology, pages 1-16, then checked twice before it went up

Practice questions on unit 1

10 multiple-choice questions written against this chapter, each with its answer and the reason. Try one before you open the answer.

Question 1

Which sub-discipline of zoology specifically studies birds?

  1. A.Entomology
  2. B.Herpetology
  3. C.Ornithology
  4. D.Ichthyology
Show the answer and why

Answer: C Ornithology

Why

Ornithology is the branch of zoology that deals with the study of birds. Herpetology studies reptiles, ichthyology studies fish, and entomology studies insects.

Question 2

What is the field of applied biology that uses computer programs to acquire, store, analyze, and disseminate biological data like DNA sequences?

  1. A.Bioinformatics
  2. B.Biotechnology
  3. C.Biomedical Engineering
  4. D.Forensic Science
Show the answer and why

Answer: A Bioinformatics

Why

Bioinformatics is concerned with the acquisition, storage, analysis, and dissemination of biological data, most often DNA and amino acid sequences, using computer programs.

Question 3

Which scientist is known for making lenses that could magnify up to 500 times and discovering bacteria and cell vacuoles?

  1. A.Antonie van Leeuwenhoek
  2. B.Robert Koch
  3. C.Louis Pasteur
  4. D.Gregor Mendel
Show the answer and why

Answer: A Antonie van Leeuwenhoek

Why

Antonie van Leeuwenhoek invented strong microscope lenses magnifying up to 500 times and used them to discover bacteria and the vacuole of the cell.

Question 4

Dr. Aklilu Lemma discovered that the soapberry plant, locally known as Endod, kills freshwater snails that carry which disease?

  1. A.Malaria
  2. B.Tuberculosis
  3. C.Cholera
  4. D.Schistosomiasis
Show the answer and why

Answer: D Schistosomiasis

Why

Dr. Aklilu Lemma showed that crushed Endod berries act as a molluscicide to kill freshwater snails carrying the parasites that cause schistosomiasis (bilharzia).

Question 5

A student in Addis Ababa examines the microscopic details of plant tissue such as parenchyma. Which branch of biology is this student practicing?

  1. A.Cytology
  2. B.Histology
  3. C.Morphology
  4. D.Anatomy
Show the answer and why

Answer: B Histology

Why

Histology is the study of the details of tissue structure (such as parenchyma and connective tissue), whereas cytology studies individual cells.

Question 6

Based on the textbook classification of pure and applied biology, which of the following is an applied field?

  1. A.Cytology
  2. B.Embryology
  3. C.Horticulture
  4. D.Paleontology
Show the answer and why

Answer: C Horticulture

Why

Horticulture is an applied field of biology because it uses biological knowledge to manage life (such as plant cultivation and gardening). Cytology, embryology, and paleontology are pure fields.

Question 7

According to the medical discoveries listed in the unit, who discovered penicillin in 1928?

  1. A.Alexander Fleming
  2. B.Frederick Banting
  3. C.Conrad Rontgen
  4. D.Edward Jenner
Show the answer and why

Answer: A Alexander Fleming

Why

Alexander Fleming discovered penicillin in 1928. Frederick Banting discovered insulin, and Conrad Rontgen discovered X-rays.

Question 8

Professor Yalemtsehay Mekonnen conducted notable research on pesticide hazards in the Rift Valley and on which medicinal plant?

  1. A.<em>Phytolacca dodecandra</em> (Endod)
  2. B.<em>Ruta chalepensis</em> (Tena Adam)
  3. C.<em>Moringa stenopetala</em> (Shiferaw)
  4. D.<em>Coffea arabica</em> (Buna)
Show the answer and why

Answer: C <em>Moringa stenopetala</em> (Shiferaw)

Why

Professor Yalemtsehay Mekonnen has done notable research on medicinal plants, especially on Moringa stenopetala (shiferaw/Alekko Shekatta).

Question 9

Robert Koch is recognized as the father of modern bacteriology because he identified the precise causal agents of which three diseases?

  1. A.Rabies, smallpox, and malaria
  2. B.Tuberculosis, cholera, and anthrax
  3. C.Schistosomiasis, polio, and measles
  4. D.Influenza, typhoid, and tetanus
Show the answer and why

Answer: B Tuberculosis, cholera, and anthrax

Why

Robert Koch is credited with pinpointing the precise causal agents of tuberculosis, cholera, and anthrax, providing experimental support for the concept of infectious disease.

Question 10

When studying the conduction of water from roots to leaves in plants, which related science explains properties like cohesion, adhesion, surface tension, and capillary action?

  1. A.Physics
  2. B.Chemistry
  3. C.Geology
  4. D.Astronomy
Show the answer and why

Answer: A Physics

Why

According to Table 1.3, physics explains physical liquid properties such as cohesion, adhesion, surface tension, and capillary action that drive water transport in plants.

The app holds 12 questions on this unit, marked as you go. These are the first 10.

The textbook pages for unit 1

Unit 1 runs from page 1 to page 16 of the Ministry of Education edition.

Ministry of Education edition, English, 177 pages

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