A small fossil reveals that the largest freshwater fish, Otophysans, emerged in the sea, not in rivers, changing the ...

This is the metadata section. Skip to content viewer section. 1. The pollen grain contains two prothallial cells. 2. The second prothallial nucleus persists and is found later in the tip of the pollen ...

This is a preview. Log in through your library . Abstract Growth of the mycoheterotrophic gametophytes of Sceptridium dissectum and Ophioglossum crotalophoroides stalls at a few cells after ...

(a) Sporophytes and (b) independent gametophytes. (c) Strap-like individual gametophytes under the microscope. Scale bar is 5.0mm. (d) Clonal forming (reproduction) by gametophytes under the ...

Edith Gwendolyn Nally does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations ...

To biologists, a "species" is the fundamental unit of categorization for life on Earth and a key tool for protecting living creatures. When you purchase through links on our site, we may earn an ...

For years, the iPhone’s two-tiered texting system has been a hot topic. iPhone-to-iPhone texts in the Messages app are blue, and enjoy full encryption and more robust media features, like animations.

Myths about cortisol—also known as the “stress hormone”—abound on social media. Here’s what experts say about this substance that helps make your body tick. Cortisol plays a critical role in your body ...

Forbes contributors publish independent expert analyses and insights. Rachel Wells is a writer who covers leadership, AI, and upskilling. As ambitious leaders and managers take on the new business ...

Some of the best known species on Earth may not be what they seem. Credit...Steve Holroyd/Alamy Supported by By Carl Zimmer Naturalists have been trying for centuries to catalog all of the species on ...

We all know what "preppy" means — don't we? If you're older than those in Generation Alpha (anyone born after 2012) you might think of a wealthy person with a particular fashion sense (collared shirts ...

Sustainable development is how we must live today if we want a better tomorrow, by meeting present needs without compromising the chances of future generations to meet their needs. The survival of our ...