2021 WAEC Biology Practical Specimen And Answer

Answer 2021large neural canal and neural arch The function of Specimen B It aids the attachment of the ribs Muscles of the specimen are back and are attached to the neural spring It assists in breathing alongside the ribs Specimen B Thoracic Vertebra Structure of Specimen B They are larger than the cervical but smaller than the lumbar vertebra in size, which is Heart Shaped. Specimen C: Lumber Vertebra Mammal Location: Specimen C are found in the upper abdominal Region Characteristics of Specimen C It has a large, flattened transverse process It has a broad and flat neural spine It has a large and thick centrum It has well-developed pie and postZygapopheses Functions of the Specimen C The lumber Vetebra Provides attachment for abdominal muscles They bear the considerable weight of the body Specimen C Lumbar The shape of Specimen C They are very large vertebra bodies that have kidney-shaped Similarities between Specimen A, B, and C The presence of Neural canal The presence of the Neural spine Present of Facet Differences between Specimen A, B, and C Specimen A Specimen B Specimen C Absent of Centrum Present of centrum Present of Centrum The Neural Spine is Absent The present of Neural Spine The present of neural Spine It has a flat and broad transverse It has a pair of the short transverse process It has a large flattened transverse process Specimen L: Adult Mosquito ( freshly obtained) Phylum: Specimen L is Arthropod Class: Specimen L is Insecta Habitat of Specimen L Specimen lives in unkept, dirty overgrown bushes and stagnant water (pour some water in a container with a wide mouth. Leave it outside a house around which some bushes are growing. After some days, you are likely to see a freshly adult mosquito Sex of Specimen L Female Mosquito Life History of Specimen L Specimen L exhibits complete metamorphosis, I.e the fertilized eggs develop to lava, then larva to pupa, and finally to adult or imago. The female mosquito lays about 2-7