For each phylum, list the characteristics; 7.) Arthropods Environment: Level of
ID: 184555 • Letter: F
Question
For each phylum, list the characteristics;
7.) Arthropods
Environment:
Level of organization (e.g. porifera = cellular):
Body symmetry:
Germ layers:
support system:
Nervous system:
Digestive system:
Circulatory system:
Respiratory system:
Excretory System:
Other Distinguishing Features:
For each phylum, list the characteristics:
9.) Chelicerates
Environment:
Level of organization (e.g. porifera = cellular):
Body symmetry:
Germ layers:
support system:
Nervous system:
Digestive system:
Circulatory system:
Respiratory system:
Excretory System:
Other Distinguishing Features:
Explanation / Answer
Development may be direct or indirect.
Fertilization is internal or external.
Unisexual
They have both compound eyes.
Fertilization is internal or external.
Characteristics Arthropods Cheliceratus Environment Aquatic terrestrial and arial forms Marine Level of organization Organ system body is divided into head, thorax and abdomen. Body symmetry Bilaterally symmetrical Segmented in two ahead of mouth and pedipalps from segment three. Germ layers Triploblastic means Ectoderm, endoderm and mesoderm They have very small coloem. Triploblastic Support system Locomotion is takes place by jointed appendages Locomotion is takes place by first pair of appandages. Nervous system Annelidian type and consist of brain and ventral nerve cord. A pair of nerve cord, brain formed by ganglion per segment and fusion of the ganglia behind the mouth. Digestive system complete, straight and well developed. Guts are narrow to take solid food. Circulatory system It is open type means blood vessels are absent and blood directly transfer to body chambers. Blood is colourless. Arteries directly supplies blood to the other body parts. They have open ends instead of joins directly to the veins. Respiratory system Respiration takesplace by general body surface or gills or booklungs in Arachinda. Have both book lungs and trachea helps to remove oxygen and waste gases from body. Excretory system Takesplace through malphigian tubules or green glands or vocal glands. They have nephrosis which excretes urine. They have malphigian tubules through whic filters blood wastage. Other distinguishing characteristicsDevelopment may be direct or indirect.
Fertilization is internal or external.
Unisexual
They have both compound eyes.
Fertilization is internal or external.
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