Which protist is responsible for causing malaria?

In science, a “Theory” is best defined as:

Darwin’s observations of which organisms on the Galapagos Islands led him to conclude that species were modified from a mainland ancestor?

Prokaryotes reproduce asexually through a process known as:

Which vascular tissue is responsible for transporting water and minerals from the roots?

The diploid generation that produces spores is the:

When similar structures arise through evolution independently in different species (such as wings in bats and insects), it is called:

According to endosymbiotic theory, mitochondria evolved from:

Which organelle in plants is thought to have evolved from engulfed photosynthetic bacteria?

The nurse is caring for a patient who is having a Mantoux test for tuberculosis.  What is the correct description of a positive reaction?