Ovulation is triggered by a surge of what hormone?

Mammals, like humans and apes, have five digits on their fore and hind limbs. Modern horses have one. How might you reconstruct the ancestral state of mammal toe number?

The most significant characteristic of the nematodes is

Which quadrilaterals always have consecutive angles that are supplementary?

What is the only continent on earth where Giraffes live in the wild?

What is the meaning of girth in biology

What part of a childs brain is resposible for licking and eating reflexes?

Which human body system do you most resemble to ribosomes and why?

What are roots made of?

Compare and contrast: How are hypothesis and theories related?

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