Which of the following is true regarding the fern life cycle?

Gymnosperms are often called ‘naked seed’ plants because:

In seed plants, the microspore develops directly into the:

Which evolutionary innovation allows lycophytes to grow taller than bryophytes?

Stomata are typically more numerous on the lower epidermis of a leaf to:

In the alternation of generations life cycle, which stage is multicellular and diploid?

The right and left coronary arteries containing oxygen rich blood originate from the base of the aorta.

What is #10?  

The blood flows down through the and into the left ventricle.  This is the part of the heart that pumps blood throughout the entire body.  After a quick burst through the aortic valve, the blood flows through the ascending aorta and out through the circulatory system to your toes.

Supplies blood to the heart muscle.