Biology 9

How can biology lead to careers in various fields?

Biology opens doors to multiple professions: Medicine & Surgery: Studying human anatomy, diseases, and treatments. Fisheries: Managing fish populations for food security and economic benefits. Agriculture: Improving crop production through plant genetics and pest control. Animal Husbandry: Breeding and raising animals for milk, meat, and wool. Biotechnology: Developing medicines, vaccines, and genetically modified organisms. Horticulture: … Read more

How is biology related to other sciences? Show and explain the link.

Biology is interconnected with several other sciences: Chemistry: Biological processes like digestion, respiration, and photosynthesis involve chemical reactions. Biochemistry explains how enzymes, proteins, and DNA function. Physics: Concepts like energy transfer, fluid mechanics (blood circulation), and biomechanics relate to biological functions. Mathematics: Used in genetics (probability in inheritance), statistics (data analysis in experiments), and ecology … Read more

Hepatitis B virus was found in the blood of 10 persons, but only 6 of them were suffering from the disease. Why?

The 4 individuals who were not showing symptoms may: Be asymptomatic carriers. Have a strong immune response preventing disease. Be in the incubation phase, where symptoms haven’t appeared yet. Related Questions: Define the following branches of biology and give at least one significance of studying these branches. Can you distinguish between: Healthy life of a … Read more

Why did Ross not allow infected mosquitoes to bite a healthy person?

Ethical concerns: It would be unethical to deliberately infect a person with malaria. Safety reasons: Malaria can be severe or fatal. Alternative methods: Ross used birds to prove mosquito transmission instead. Related Questions: Define the following branches of biology and give at least one significance of studying these branches. Can you distinguish between: Healthy life … Read more

The diagram shows one insect. Answer the following questions related to it.

a) Why do we use the word vector for a mosquito? A mosquito is called a vector because it transmits disease-causing pathogens (e.g., Plasmodium) from one host to another. b) What is the name of the organism that transmits malaria disease in humans and birds? Plasmodium (a protozoan parasite). c) What was the main purpose … Read more

Why is it impossible to eradicate malaria?

Complete eradication is difficult because: The Plasmodium parasite has a complex life cycle. Mosquito vectors (Anopheles) are widespread. Drug resistance in Plasmodium is increasing. Insecticide resistance in mosquitoes is growing. Some malaria-endemic areas lack proper healthcare and preventive measures. Related Questions: Define the following branches of biology and give at least one significance of studying … Read more

A Nobel Prize winner gave a hypothesis about the effects of the COVID-19 vaccine. Can it be wrong? Why? Develop a deduction from the hypothesis, “Vaccination of COVID-19 can reduce the severity of complications in case of infection.”

Yes, a hypothesis, even if proposed by a Nobel Prize winner, can be wrong. In science, hypotheses are tested through experiments and observations. If evidence contradicts the hypothesis, it is modified or rejected. Deduction: If the hypothesis is correct, then vaccinated individuals should experience fewer severe complications compared to unvaccinated individuals when infected with COVID-19. … Read more

Observations are mainly of two types, qualitative and quantitative. Sort the following observations accordingly:

Qualitative (Descriptive, No Numbers): Color of cat Shape of leaves Song of a bird Climate of desert Quantitative (Measured with Numbers): Height of giraffe Weight of mango fruits Body temperature of birds Volume of blood in humans Speed of tiger Related Questions: Define the following branches of biology and give at least one significance of … Read more

What is the contribution of the following scientists?

a) A.F.A King: Suggested a link between mosquitoes and malaria. b) Ronald Ross: Discovered that mosquitoes transmit malaria. c) Laveran: Identified Plasmodium as the cause of malaria. Related Questions: Define the following branches of biology and give at least one significance of studying these branches. Can you distinguish between: Healthy life of a person depends … Read more

Healthy life of a person depends on healthy life choices. How does the study of biology help in maintaining a healthy life?

Biology helps us understand nutrition, diseases, and bodily functions, enabling us to make informed health choices. Related Questions: Define the following branches of biology and give at least one significance of studying these branches. Can you distinguish between: