- AFacultative
- BObligate
- CBoth A and B
- DCosmopolitan
Explanation:
Facultative means false and obligate means true. So, those parasites which cannot survive without their host are called obligate parasites, whereas, those parasites which can survive without a host are called facultative parasites.
Green plants in genera such as Rhinanthus and Colpoon can grow independently of any host, but they also act opportunistically as facultative root parasites of neighboring green plants.
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$I.$ The cells of malignant tumours divide erratically.
$II.$ They are malignant tumours of epithelial cells.
$III.$ They are malignant tumours of organs that originate from mesoderm.
$IV.$ These tumours are found in organs such as spleen and lymph nodes.
Which of the above are true for angiosarcoma?