Yikes, I’m not on top of things. The Leonid Meteor shower coming on November 16/17. Hope you get to see it.
Here’s a blurb from space.com
Yikes, I’m not on top of things. The Leonid Meteor shower coming on November 16/17. Hope you get to see it.
Here’s a blurb from space.com
Today let’s take a look at some plants that are often ignored because they lack big, showy flowers. Ferns, liverworts, horsetails and mosses do not produce seeds, but produce spores instead.
Activity 1. Identification
Go on a nature walk and see if you can spot any of these spore-producing plants. Record where you see them and what the surrounding environment is like.

Mosses are low-growing plants with tiny leaflets. They coat the ground like velvet.

Ferns have leaf blades divided into many parts.

Photo from Flickr
Liverworts have rounded leaflets that are said to resemble the liver.

Horsetails have tall stems, with segments. Their leaves are long and fine, resembling a horse’s tail.
Did you find any of these plants?
Activity 2. Searching for spores.
Because these plants make spores instead of seeds, it is fun to see if you can find the structure that produces spores, the sporangium. If you don’t have any of these plants growing nearby, check with your local florist. They sometimes use ferns in bouquets.

See the dark dots on the underside of the frond? Those are the sporangia.
Check out this video of fern spore capsules shooting out the spores like a catapult!

The yellow brown structures on this moss are the sporangia.
What is the difference between a seed and a spore? A spore is a single cell, so it is tiny. In comparison, a seed contains many cells making up the embryo of the plant, the food that is stored with it, and a cover or coat.
Activity 3. Moss, horsetail, fern and liverwort habitats.
When you went on the nature walk, where did you find these plants? Did you find them mostly in wetter areas? Were any growing in the forest?


Did you find them growing together?
Ferns, mosses, horsetails and liverworts have somewhat similar growing requirements. Liverworts and mosses are considered to be non-vascular plants because they lack the special water-carrying tubes found in other plants. They must stay in relatively wet environments and can’t grow tall.
Aren’t these interesting plants?
Edit: If you are interested in learning more, take a look at Steve Parker’s Ferns, Mosses and Other Spore-producing Plants book, which is part of the Kingdom Classification series. I have a review at WrappedinFoil.
The Central Arizona branch of the Association for Women in Science recently sent out a transcript of a conversation with the four women who won Nobel Prizes this year. The transcript is from an article is titled:Â 2009 Nobels: Break or Breakthrough for Women? Science Volume 326, Number 5953, Issue of 30 October 2009
Because some of you may be considering careers in science, or are encouraging children who want to become scientists, I will pass on some of their remarks.
First of all, the women who won Nobel Prizes in 2009 are Elizabeth Blackburn and Carol Greider, who won in the category of physiology or medicine with along with Jack Szostak. They studied how chromosomes are protected from degradation during cell divisions. Blackburn is a professor of biology and physiology at the University of California, San Francisco, and Greider is a professor at Johns Hopkins University School of Medicine in Baltimore. Ada Yonath is from Israel. She won with Thomas Steitz and Venkatraman Ramakrishnan in chemistry, for uncovering the structure of the ribosome. Elinor Ostrom won with Oliver E. Williamson in economic sciences for their work on economic transactions going on outside of markets. Her main affiliation is with Indiana University. For more photographs and more information, see http://nobelprize.org/
Counting these four women, the total number of women to win the Nobel Prize (since it began in 1901) is 17, a mere 2.8% of all the winners. The interviewers were largely interested in the women’s views why this might be the case. As you might expect, the answers are as diverse as the women themselves.
When asked what could be done to encourage women to participate in the sciences, Elizabeth Blackburn suggested that leadership training for postdoctoral fellows potentially could help retain women at a time when many drop out of their careers. Carol Greider concedes that scientific mentors often haven’t received formal training in areas like leadership, they figured it out themselves. This make it hard for them to pass it on successfully.
Ada Yonath, however, thought the answer might lie in the steps before the post graduate. She says,”Although girls and young women are taking classes in the life sciences and chemistry, only a few of them make it to the next and the next and the next step. And this is maybe because there is not enough effort made in making them appreciate science and love science and develop their scientific curiosity.”
Yonath goes on to say that she thinks it is important for scientists to go talk to children and let them know what science is really like. She explains that in Israel they have a formal organization that sends academic scientists to talk to high school and early college-aged girls about their careers. She believes that if scientists are able to convey their passion, their love of science, then others may see that it is possible to pursue their own interests and be successful.
Obviously this is a highly complicated issue, but I’d like to add a practical hint. Even without formal organizations for girls to meet scientists, many colleges and universities offer open houses, family days, tours and other events open to the public. Your children can see research projects, interact with scientists and students, and often do hands on activities. Be proactive and do your own research into events, because many of these are not advertised extensively. The events/activities are often affiliated with a particular department, such as astronomy or geology. Check websites and even make a few phone calls, if necessary.
Examples:Â Cornell University College of Veterinary Medicine Open House
College of Nanoscale Science and Engineering of the University at Albany from On Living On Learning post.
Earth Science and Space Exploration Day at Arizona State University.
Congratulations to these four women for their achievements. Now, let’s go have some fun and encourage our daughters’ interests in science by taking advantage of the many wonderful opportunities available.
This post was prepared for the Diversity in Science Carnival, hosted this month at Urban Science Adventures! ©. I will let you know when the carnival is up.
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