27 reviewed questions with answers and explanations.
Practice selection: full-paper coverage has not been confirmed.
Which of the following structures is a protective adaptive feature of the Agama Lizard to the environment?
C: Scaly skin
Keratinised scales protect lizard skin and help limit water loss. This covering supports life on land, unlike the generally more permeable skin of amphibians.
AI-reviewed · source checkedWhich structure is directly specialised for processing or taking in food in an insect?
A: suitable mouthparts
Insect mouthparts are modified for tasks such as biting, sucking or piercing food. Their form is closely related to how an insect obtains its diet.
AI-reviewed · source checkedWhich of the following is NOT part of the carbon cycle?
C: Nitrates formation
Nitrate formation belongs primarily to the nitrogen cycle. Photosynthesis, decomposition and organic carbon storage are directly involved in movement of carbon through ecosystems.
AI-reviewed · source checkedI. Tissues II. System III. Cell IV. Organs Which of the above is the level of organization of a leaf?
A: IV
A leaf is an organ containing several tissues that work together. Epidermal, vascular and photosynthetic tissues contribute different functions within that one structure.
AI-reviewed · source checkedIn cellular respiration, energy is stored in the form of
D: adenosine triphosphate
Cellular respiration transfers some energy from fuels into ATP, adenosine triphosphate. Cells then couple ATP reactions to processes requiring energy.
AI-reviewed · source checkedThe principal photosynthetic organ in a typical leafy plant is the
D: green leaf
A green leaf is a major photosynthetic organ in a typical leafy plant. Its chloroplast-rich tissues capture light and produce organic compounds.
AI-reviewed · source checkedThe process by which heritable favourable traits become more common through differential survival and reproduction is
D: natural selection
Natural selection changes populations when heritable traits affect survival and reproduction. Individuals with advantageous variants can leave more descendants under the prevailing conditions.
AI-reviewed · source checkedThe rise and fall of ocean water during the day is referred to as
C: tide
Tides are periodic changes in sea level driven chiefly by the gravitational effects of the Moon and Sun together with Earth’s rotation. Local coasts affect their pattern.
AI-reviewed · source checkedWhich of the following is a producer in an aquatic habitat?
A: Nymphaea
Nymphaea, a water lily, photosynthesises and acts as a producer in aquatic habitats. Planarians and blackflies are consumers rather than photosynthetic plants.
AI-reviewed · source checkedI. Tissue II. System III. Cell IV Organ The correct sequence of increasing level of complexity is
D: III-I-IV-II
Cells form tissues, tissues form organs, and organs cooperate in organ systems. The sequence is therefore III, I, IV, II.
AI-reviewed · source checkedBacteria which add atmospheric nitrogen to the soil are
C: nitrogen fixing bacteria
Nitrogen-fixing bacteria convert atmospheric nitrogen into biologically usable nitrogen compounds. This introduces nitrogen into soil food webs rather than returning it to the atmosphere.
AI-reviewed · source checkedThe spines of the hedgehog is an adaptive features for
B: defence
Hedgehog spines deter predators, especially when the animal curls to expose its spiny covering. They are modified hairs serving a protective function.
AI-reviewed · source checkedWhich of the following instruments is used to measure temperature?
A: Thermometer
A thermometer measures temperature using a property that changes predictably with thermal conditions. It is different from instruments for humidity, wind or liquid density.
AI-reviewed · source checkedIn human, puffiness and water retention in the body is a possible symptom of
C: kidney malfunction
Kidney dysfunction can impair salt and water regulation and contribute to swelling. Swelling has several possible causes, so this symptom alone is not a diagnosis.
AI-reviewed · source checkedDescent with modification through common ancestry is central to the evolutionary account associated with
B: Darwin
Darwin developed an account of descent with modification linking living forms through ancestry. Natural selection was a central proposed mechanism of evolutionary change.
AI-reviewed · source checkedDietary roughage in humans helps bowel contents move through the gut and can therefore
C: ease digestion
Dietary fibre supports movement and bulk of intestinal contents in humans. Some fibre is fermented by gut microbes, but much resists digestion by human enzymes.
AI-reviewed · source checkedThe lowest taxonomic rank among these choices is
D: species
Species is the lowest taxonomic rank among the listed categories. Kingdom, phylum and class are broader groupings containing many species.
AI-reviewed · source checkedTwo important process involved in the absorption and transport of materials in plants are
D: osmosis and diffusion
Osmosis moves water across selectively permeable membranes, while diffusion moves substances down concentration gradients. Both contribute to material movement in plants.
AI-reviewed · source checkedThe organelle responsible for oxidative phosphorylation in a typical eukaryotic cell is the
D: mitochondrion
Mitochondria are the sites of oxidative phosphorylation in typical eukaryotic cells. Glycolysis takes place in the cytosol, so cellular respiration is not exclusively mitochondrial.
AI-reviewed · source checkedIn which part of Nigeria are Mangrove swamps found?
B: Niger Delta
The Niger Delta includes coastal tidal wetlands supporting extensive mangroves. Mangroves tolerate saline, waterlogged conditions unlike the inland highlands and basins listed.
AI-reviewed · source checkedIn a small unicellular organism, diffusion is sufficient for transport because
D: the surface area to volume ratio is large
Small cells have a relatively large surface area compared with their volume and short internal transport distances. These features make exchange by diffusion more effective.
AI-reviewed · source checkedEarly tetrapods moving onto land were most closely described as which traditional vertebrate group?
B: Amphibians
Early land-going tetrapods were amphibian-like vertebrates descended from fishes. Modern amphibians retain features linking aquatic reproduction and terrestrial activity.
AI-reviewed · source checkedWhich climatic pair most strongly shapes the broad distribution of terrestrial biomes?
D: Temperature and rainfall
Temperature and precipitation strongly influence the broad distribution of terrestrial biomes. They affect water availability, growing seasons and the vegetation a region can support.
AI-reviewed · source checkedI. Strong winds II. high temperature III. Dry and porous soils. Which group of plants are specially adapted to grow under environmental conditions stated above?
C: Xerophytes
Xerophytes are adapted to water-limited conditions. Hot, windy surroundings and porous dry soils can increase water stress, favouring traits that conserve or store water.
AI-reviewed · source checkedProfuse watery diarrhoea with rapid dehydration is particularly characteristic of which listed disease?
A: cholera
Cholera can cause profuse watery diarrhoea leading rapidly to dehydration and weakness. Other illnesses can also cause diarrhoea, so symptoms alone do not confirm the infection.
AI-reviewed · source checkedWhich example concerns a functional ability rather than a visible structural difference?
D: ability to roll the tongue
The ability to roll the tongue concerns how a person can move a body part. Fingerprints, body dimensions and outward appearance describe structural or morphological variation.
AI-reviewed · source checkedIn photosynthesis, oxygen is liberated during
B: photolysis
The oxygen released during photosynthesis comes from water split in the light-dependent reactions. This photolysis supplies electrons and protons as well as oxygen.
AI-reviewed · source checked