Nanotechnology
Which of the following correctly represents one nanometer (nm) in meters?
C. 1 × 10⁻⁹ m
What does GMO stand for?
Genetically Modified Organism
What do you call a species that is found only in a particular geographic area and nowhere else in the world?
Endemic species
Which gas is NOT considered greenhouse gas?
A. Carbon dioxide
B. Argon
C. Methane
D. Nitrous oxide
B. Argon
Which microscope provides high-resolution images focusing on a material’s surface with electrons?
A. Light Microscope
B. Optical Microscope
C. Scanning Electron Microscope
D. Transmission Electron Microscope
C. Scanning Electron Microscope
Which nanomaterial is commonly used to enhance MRI imaging?
A. Gold nanoparticles
B. Iron oxide nanoparticles
C. Silver nanoparticles
D. Silicon nanoparticles
B. Iron oxide nanoparticles
Which of the following is a societal benefit of GMOs?
A. Increased biodiversity
B. Increased food security
C. Reduced internet usage
D. Decreased crop yield
B. Increased food security
Which of the following is a density-independent factor affecting populations?
A. Competition for food
B. Fishnet entanglement
C. Tropical storm Sendong
D. Predator-prey relationship
C. Tropical storm Sendong
Which sector contributes the most to global greenhouse gas emissions?
A. Agriculture
B. Transportation
C. Energy production
D. Waste management
C. Energy production
Which of the following is a consequence of ocean acidification?
A. Coral bleaching
B. Increased fish populations
C. Higher oxygen levels in water
D. Decreased water temperature
A. Coral bleaching
What is a major concern regarding the environmental impact of nanotechnology?
A. Deforestation
B. Increased greenhouse gases
C. Accumulation of nanoparticles in soil and water
D. Overuse of fossil fuels
C. Accumulation of nanoparticles in soil and water
Which of the following is NOT a genetically modified crop?
A. Bt Corn
B. Golden Rice
C. Purple Tomato
D. Square Watermelon
D. Square Watermelon
If the crocodile population decreases, what happens to its prey according to predator-prey dynamics?
A. Prey population increases
B. Prey population decreases
C. Prey migrates to other areas
D. No effect on prey populations
A. Prey population increases
Which of the following initiatives is aimed at climate change mitigation?
a. Building more highways
b. Reforestation programs
c. Increasing fossil fuel subsidies
d. Promoting single-use plastics
b. Reforestation programs
The ability of organisms to reproduce under ideal conditions.
Biotic potential
This type of microscope uses transmitted electrons to create high-resolution images of thin samples.
Transmission Electron Microscope (TEM)
Which of the following is a correct comparison between GMO and selective breeding?
A. Both can cross species barriers
B. GMO has lower precision than selective breeding
C. Selective breeding involves direct DNA modification
D. GMO allows crossing species barriers, unlike selective breeding
D. GMO allows crossing species barriers, unlike selective breeding
Which statement best describes a density-dependent factor?
A. A factor that affects populations equally, regardless of their size
B. A factor whose impact changes with the number of individuals in a given area
C. A factor that arises mainly from periodic environmental changes
D. A factor that limits growth through unpredictable natural events
B. A factor whose impact changes with the number of individuals in a given area
Which of the following best describes the chemistry behind climate change?
a. Oxygen reacts with nitrogen to form ozone
b. Carbon dioxide reacts with water to form acid rain
c. Methane reacts with sunlight to cool the atmosphere
d. Greenhouse gases absorb infrared radiation, warming the Earth
d. Greenhouse gases absorb infrared radiation, warming the Earth
Which Philippine executive order strengthened biosafety regulations for GMOs?
A. EO No. 430
B. EO No. 514
C. EO No. 1017
D. EO No. 2020
B. EO No. 514
Which nanotechnology innovation uses nanostructures to repel water and resist stains?
Superhydrophobic Coatings
What does the “Bt” in Bt corn stand for?
Bacillus thuringiensis
What are the two primary ecological factors?
Birth and Death
What chemical compound is formed when carbon dioxide dissolves in ocean water, contributing to ocean acidification?
Carbonic acid (H₂CO₃)
Name the international agreement signed in 2015 that aims to limit global temperature rise to below 2°C.
Paris Agreement