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Questions in biology

[Free] Which substance is constantly processed by some excretory organs even though it is not excreted by the excretory system?

[Free] This omnivore eats berries in summer and salmon in fall. What is it?

[Free] What does "property" mean in science?

[Free] The circulatory system is divided into two main parts, the _________ circulation and the pulmonary circulation.

[Free] Protecting an entire ecosystem ensures that

[Free] Is breathing completely involuntary?

[Free] What two instruments made navigation much easier in the 1900s?

[Free] What makes lipids different from other organic compounds?

[Free] What is the haploid number of chromosomes in humans? A. Twenty-three

[Free] What has improved to make scientists better able to understand the cell?