Name: Subject: Biology Date: Marks
Gr:9C/D Movement in molecules Submission date: 10
16.09.24
Section – A
1. Some lizards detach their tails when threatened by a predator. Which characteristic is shown?
A excretion B growth C reproduction D sensitivity
2. The diagram shows a key for five vertebrates.
Which class of vertebrates does organism W belong to?
A. Amphibians B. birds C. fish D. reptiles
3. What are the characteristics of bony fish?
4. Use the key to identify which group is amphibians.
1 hair present …………………………… mammals hair absent ……………………………. go to 2
2 feathers present ………………….…… group A feathers absent………………….……. go to 3
3 dry scaly skin……………………….….. group B moist skin ………………….……….….. go to 4
4 four limbs …………………………….… group C no limbs ………...…………….....…...… group D
5. What is a correct way of naming a species, according to the binomial system?
A Homo sapiens B Homo Sapiens C human being D sapiens
6. What is not a characteristic of all living organisms?
A. excretion B. photosynthesis C. reproduction D. respiration
Section-B
1. The given figure is an electron micrograph showing the bacteria, Vibrio cholerae.
a. Bacteria are prokaryotes. State two distinguishing features of all prokaryotes.
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b. The bacteria shown in the figure each have a flagellum. Suggest the function of the flagellum in
bacteria
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2. Myriapods are a group of arthropods that are commonly found in soil habitats in many parts of the
world. Many myriapods are very small and not easy to identify. The figure shows four species of
myriapod, not drawn to the same scale.
a. State three features of all myriapods that are visible in the figure
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3. Mitochondria are cell structures that contain a small quantity of DNA. Scientists are sequencing the
DNA of one particular gene in mitochondria to help identify different species of many animals including
myriapods.
a. State the part of the cell that contains most of the DNA.
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b. State the function of DNA in cells.
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4. Arachnids, crustaceans, insects and myriapods are all classified as arthropods. Scorpions, such as
Heterometrus swammerdami shown in Figure, are arachnids.
a. State three features, shown by H. swammerdami and visible in the figure, that arachnids share with
other arthropods.
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b. The given table shows some of the external features of the five classes of vertebrates. Complete the
table by using a tick to indicate if each class has the feature or a cross if it does not. The first row has
been completed for you.
