Life Sciences
2026 · Paper 1
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Complete GATE XL 2026 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 85–87 of 122. Imported answers require review unless explicitly marked reviewed.
Question 85
Open questionXL-TMCQ1 markNeeds review
A researcher sets up ten large outdoor tanks, each containing the same amount of algae and the same number of guppies (herbivorous fish). In five of these tanks, she also adds gourami fish, which are predators of guppies. Tanks were covered in mesh so no new species could enter. After 2 months, the researcher counted the number of guppies and gouramis, and measured the amount of algae. She found that the amount of algae was much higher in the tanks with gourami fish compared to those without gourami fish. Which one of the following processes best explains the differences in amounts of algae between these tanks?
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Open questionXL-TMCQ1 markNeeds review
Immunoglobulins are classified into the following isotypes: IgG, IgM, IgA, IgD, IgE. What region of the immunoglobulin is used to determine this classification?
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 87
Open questionXL-TMCQ1 markNeeds review
Correctly match the cell types in Column I to their primary function in Column II.
Column I:
P) Melanocyte
Q) Myocyte
R) Granulocyte
S) B-cell
Column II:
Muscle contraction
Pigment production
Antibody production
Estrogen secretion
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