Stamens, sepals, petals, carpels, and pinecone scales are all ________.

To apply the principle of maximum parsimony to construction of a phylogenetic tree, ________.

In angiosperms, the ______ is a nutrient-storing tissue that nourishes a developing embryo.

Use the following information to answer the question. Which of the following trees, if any, depicts the same relationship among species as shown above?  

Corn, rice, wheat, fleshy fruits such as apples and berries, and many spices are all produced by ________.

According to the theory of endosymbiosis, which organelles evolved from small prokaryotes that established residence within other, larger prokaryotes?

Which structure is found in angiosperms but not gymnosperms?

In angiosperms, pollen grains develop in the ________ and land on the ________.

You are given an unknown organism to identify. It is unicellular and heterotrophic. It is motile, using many short extensions of the cytoplasm. It has well-developed organelles and two nuclei, one large and one small. This organism is most likely to be a ________.

What is this organism?