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    This assignment is for you if you are HL Bio and
    a 12th grader in September 2018.

    IB Biology HL Summer Homework 2: Drawings


    Practice your science diagram drawing skills this summer. Complete the required drawings listed on the next page to turn in on the FIRST day of school. Use you online resources. You may enhance your drawings with color for your own benefit but understand that the drawings you complete on you IB exam will be in a single pen color.

     Here are two examples of BAD drawings:

    bad bio drawings

    Here is an example of a
    GOOD drawing:

     ib bio good drawing







    Draw and annotate a diagram of the ultrastructure of Escherichia coli (E. coli).

    The diagram should show the cell wall, plasma membrane, cytoplasm, pili, flagella, ribosomes and nucleoid (region containing naked DNA).


    Draw and annotate a diagram of the ultrastructure of a liver cell.

    The diagram should show free ribosomes, rough endoplasmic reticulum (rER), lysosome, Golgi Apparatus, mitochondrion and nucleus.

    The Golgi Apparatus will be used in place of the Golgi body, Golgi complex, or dictyosome.


    Draw and label a fluid mosaic model to show the structure of membranes.

    The diagram should show the phospholipid bilayer, cholesterol, glycoproteins, integral, and peripheral proteins. Use the term plasma membrane, not cell surface membrane for the membrane surrounding the cytoplasm. Integral proteins are embedded in the phospholipid of the membrane, whereas peripheral proteins are attached to its surface. Variations in composition related to the type of membrane are not required.


    Draw molecular diagrams of glucose, ribose, a saturated fatty acid and a generalized amino acid.



    Draw molecular diagrams to show the formation of a peptide bond.



    Draw simple diagrams of the structure of single nucleotides of DNA and RNA, using circles, pentagons, and rectangles to represent phosphates, pentoses, and bases.

    An extension of the diagram in 2.6 is to show the complementary base pairs of A-T and G-C, held together by hydrogen bonds and the sugar-phosphate backbones. The number of hydrogen bonds between pairs and the details of purine/pyrimidines are not required.


    Draw an absorption spectrum for chlorophyll and an action spectrum for photosynthesis.



    Draw and annotate diagrams to show the stages of meiosis resulting in the formation of four haploid cells.



    Draw and label a diagram of the carbon cycle to show the processes involved.

    The details of the carbon cycle should include the interaction of living organisms and the biosphere through the processes of photosynthesis, cell respiration, fossilization, and combustion. Recall of specific quantitative data is not required.


    Draw, label, and annotate a diagram of the digestive system.

    The diagram should show the mouth, esophagus, stomach, small intestine, large intestine, anus, liver, pancreas, and gall bladder. The diagram should clearly show the interconnections between these structures.


    Draw and annotate diagrams of male and female reproductive systems to show names of structures and their functions.

    The relative positions of the organs is important. Do not include any histological details, but include the bladder and urethra.


    HL DRAWINGS – do your best and use your online resources!


    Draw the structure of primary xylem vessels in sections of stems based on microscope images.

    Diagram should include cortex, epidermis, pith, vascular bundle (xylem, cambium, phloem).


    Draw internal structure of seeds.

    Diagram should include seed coat, cotyledon, embryo shoot (plumule), embryo root (radicle).


    Draw half-views of animal-pollinated flowers.

    Diagram should include stigma, style, anther, petal, filament, sepal, ovaries, and nectary.


    Draw diagrams to show chiasmata formed by crossing over

    Drawings should illustrate an annotated step-by-step process.


    Draw and annotate a diagram of the human elbow.

    Annotations should include humerus, triceps, biceps, joint-capsule, synovial fluid, radius, ulna, cartilage, tendon


    Draw labelled diagrams of the structure of a sarcomere.

    Diagram should include thick myosin filaments, thin actin filaments, light band, dark band, Z-line, sarcomere, myosin heads.


    Draw and label a diagram of the human kidney.

    Diagram should include renal artery, renal vein, cortex, medulla, pelvis of kidney, ureter.



    Draw and annotate embryonic tissues in Xenopus, used as an animal model, during neurulation.

    Diagram should illustrate an annotation of the step-by-step process. Labels should include ectoderm, mesoderm, and endoderm, wall of developing gut and gut cavity, notochord, developing dorsal fin.


    Draw and label a diagram of the structure of the human eye.

    Diagram should include lens, aqueous humour, pupil, iris, conjunctiva, cornea, vitreous humour, sclera, choroid, retina, fovea, optic nerve, blind spot.


    Draw and annotate a diagram of the retina to show the cells types and the direction of the light source.

    Diagram should include direction of light, ganglion cell, nerve fibers of ganglion cells, bipolar neuron, rod cell, cone cell, layer of pigmented cells.


    Draw and label a diagram of the structure of the human ear.

    Diagram should include pinna, bones of skull, ear drum, muscles attached, malleus, incus, stapes, oval window, semicircular canals, auditory nerve, cochlea, round window.

    A.4 (HL)

    Draw and label a diagram of a reflex arc for a pain withdrawal reflex.

    Diagram should include receptor cells, nerve fiber of sensory neuron, spinal nerve, dorsal root of spinal nerve, ventral root of spinal nerve, cell body of sensory neuron in the dorsal root ganglion, relay neuron, central canal, grey matter, white matter, cell body of motor neuron, nerve fiber of motor neuron, effector