All land plants are oogamous, multicellular and exhibit sporic meiosis.

Molecular data indicate that the gnetophytes (Gnetum, Ephedra, Welwitschia) are most closely related to:

All of the following statements about pollen grains are true EXCEPT which one?

Species in the Rhizaria and Stramenopiles are entirely unicellular.

In a typical haplontic life cycle, meiosis is zygotic.

Species that have an alternation of generations life cycle exhibit which of the following characteristics?

Cognitive declines in processing speed and working memory capacity and reduced effectiveness in processing irrelevant information is likely in older adults.  

What is the leading cause of blindness in older adults? 

Chronic sleep deprivation may contribute to cardiovascular disease and a shortened life span

Researchers have found that when older adults engage in complex tasks and challenging activities at work their cognitive function show less age related decrease.