Biology Revision Midterm - Grade 9

<p>Pinnae (external ear) (A)</p> Signup and view all the answers

<p>Fish lay eggs without shells in water (A)</p> Signup and view all the answers

<p>The cell loses turgidity and becomes flaccid. (B)</p> Signup and view all the answers

<p>It causes denaturation, altering the enzyme's structure. (C)</p> Signup and view all the answers

<p>There is no net movement of water; the cell size remains the same. (B)</p> Signup and view all the answers

<p>Adenine pairs with Thymine, Guanine pairs with Cytosine. (B)</p> Signup and view all the answers

<p>The substrate can no longer bind to the enzyme. (C)</p> Signup and view all the answers

<p>To speed up metabolic reactions without being consumed (D)</p> Signup and view all the answers

<p>Movement of water molecules across a semi-permeable membrane (B)</p> Signup and view all the answers

<p>Movement of particles against their concentration gradient using energy (D)</p> Signup and view all the answers

<p>A permanent increase in size and mass through cell number or size (D)</p> Signup and view all the answers

<p>A group of organisms that can reproduce and produce fertile offspring (C)</p> Signup and view all the answers

<p>To move particles from high to low concentration without energy (A)</p> Signup and view all the answers

<p>The removal of toxic materials and waste products (B)</p> Signup and view all the answers

<p>Monocots have 3 or multiples of, while dicots have 4 or 5 or multiples of (C)</p> Signup and view all the answers

<p>A collection of cells that perform a specific function (C)</p> Signup and view all the answers

<p>Plant cell (C)</p> Signup and view all the answers

<p>Myriapods (D)</p> Signup and view all the answers

<p>They are reticulated or branched (C)</p> Signup and view all the answers

<p>Benedict's Test (A)</p> Signup and view all the answers

<p>Brick red/lilac (D)</p> Signup and view all the answers

<p>Animal cell (B)</p> Signup and view all the answers

<p>Cell wall (D)</p> Signup and view all the answers

<p>Cellulose (A)</p> Signup and view all the answers

<p>Active transport (A)</p> Signup and view all the answers

<p>It moves into the cell (C)</p> Signup and view all the answers

<p>Glucose (B), Maltose (C)</p> Signup and view all the answers

<p>Temperature (D)</p> Signup and view all the answers

<p>It always occurs across a semi-permeable membrane. (D)</p> Signup and view all the answers

<p>GLYCOGEN (B)</p> Signup and view all the answers

<p>3 fatty acids and 1 glycerol (A)</p> Signup and view all the answers

Animals like mammals and birds that can maintain a constant body temperature regardless of the environment.

Animals like reptiles, amphibians, and fish that rely on external sources like the sun to regulate their body temperature.

A hard outer covering that protects and supports the body of an animal.

Joints that allow for movement and flexibility in an animal's legs.

Distinct body sections in an animal's body.

The movement of particles from a region of higher concentration to a region of lower concentration due to random movement.

The movement of water molecules across a semi-permeable membrane from a region of higher water potential to a region of lower water potential.

The movement of particles against their concentration gradient, requiring energy.

Proteins that act as biological catalysts, speeding up chemical reactions in living organisms without being used up.

Any substance that speeds up a chemical reaction without being changed itself.

The ability to detect or sense changes in the internal or external environment and respond accordingly.

A group of similar cells that work together to perform a specific function.

A group of different tissues that work together to perform a specific function.

A large molecule is a complex molecule made up of smaller repeating subunits. They are often polymers, meaning they are made up of many smaller molecules (monomers) linked together.

A monomer is a small molecule that can join with other monomers to form a larger molecule.

The process of breaking down large molecules into smaller molecules. This is often done with the help of enzymes.

The process of building up large molecules from smaller molecules. This is often done with the help of enzymes.

The movement of molecules from an area of high concentration to an area of low concentration. This movement does not require energy.

The movement of water molecules from an area of high water potential to an area of low water potential across a partially permeable membrane.

The movement of molecules from an area of low concentration to an area of high concentration. This movement requires energy.

Enzymes are biological catalysts that speed up chemical reactions. They are specific to the molecule they act on.

When a cell is placed in a solution with a lower water potential than its own, water moves out of the cell. This causes the cell to shrink and lose turgor pressure, becoming flaccid or plasmolysed in plant cells, or shrivelled / crenated in animal cells.

The pressure exerted by the cell contents against the cell wall in a plant cell. This pressure helps to maintain the plant's rigid structure.

When a cell is placed in a solution with the same water potential as its own, there is no net movement of water in or out of the cell. The cell size remains constant.

The process by which enzymes lose their shape and function due to exposure to high temperatures.

The specific region on an enzyme where the substrate binds and the chemical reaction takes place.

Insects are characterized by having three pairs of legs, a single pair of antennae, and their bodies are divided into three distinct segments: head, thorax, and abdomen.

Arachnids are distinguished by having four pairs of legs, no antennae, and two body segments: a cephalothorax (fused head and thorax) and an abdomen.

Crustaceans are identified by having more than four pairs of legs, two pairs of antennae, and their bodies are divided into two or three segments.

Myriapods are easily recognizable by having numerous pairs of legs, a single pair of antennae, and their bodies are made up of many similar segments.

Monocots are identified by having flower parts in multiples of three, parallel leaf veins, and a single cotyledon (seed leaf).

Dicots are distinguished by having flower parts in multiples of four or five, reticulated or branched leaf veins, and two cotyledons (seed leaves).

Plant cells are distinguished by the presence of a cellulose cell wall, chloroplasts for photosynthesis, and a large central vacuole for storage and support.

Animal cells lack a cell wall, chloroplasts, and a large central vacuole. They have mitochondria for energy production.