What type of cattle were used in the study?

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Multiple Choice

What type of cattle were used in the study?

Explanation:
The main idea is understanding how sex and reproductive status influence animal physiology and study results. Heifer calves are young female cattle that have not yet calved. Using them gives a uniform group of females without the effects of pregnancy, lactation, or male hormones, which helps reduce variability and isolates the trait or response being studied. Bull calves are males, and their testosterone can affect growth and behavior; steers are castrated males, with different growth patterns and hormone profiles; calves of mixed sex would include both sexes, introducing hormonal variability that could confound results.

The main idea is understanding how sex and reproductive status influence animal physiology and study results. Heifer calves are young female cattle that have not yet calved. Using them gives a uniform group of females without the effects of pregnancy, lactation, or male hormones, which helps reduce variability and isolates the trait or response being studied.

Bull calves are males, and their testosterone can affect growth and behavior; steers are castrated males, with different growth patterns and hormone profiles; calves of mixed sex would include both sexes, introducing hormonal variability that could confound results.

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