oak wood

Oak Wood Cross Section

Cross section of oak wood, showing every reason that made an oak tall and strong. The large pores are vessels that are responsible for transporting (more accurately, pumping/pushing) water from the root system to the tip of the tree. The densely packed purple dots are stained lignin in the cells walls. During early wood development, once lignin is deposited in the cell wall, these cells … Continue reading Oak Wood Cross Section

holly wood

Holly Wood Tangential Section

Tangential section of wood of Chinese holly. This is how it looks like when you do a cut that’s perpendicular to the radius of the stem. The vertical lines are vessels transporting water from roots to leaves, while the circles are clustered ray cells that function to transport fluids and nutrients radially and laterally (perpendicular to the long axis) within a woody stem. Contributed by … Continue reading Holly Wood Tangential Section

monocot leaf epidermis

Monocot Leaf Epidermis

Microscope image of the epidermis of a spiderwort leaf with well-organized stomata in high density. Stomata (singular stoma) are like little mouths on the leaf surface, specialized in gas-exchange – CO2 enters a plant through them. The opening and closure of stomata are tightly controlled, because when stomata are open, water is escaping from the plant too. Therefore, each plant needs to find a delicate … Continue reading Monocot Leaf Epidermis

crown-of-thorns-starfish-phuket-big

Using your own DNA against you: Bio-control of coral reef pest might be possible

Crown-of-thorns starfish (COTS) are decimating coral populations along the Great Barrier Reef. Scientists have sequenced COTS genomes in the hopes of turning their own biology against them. Researchers think they have found the peptides the COTS use to communicate with each other. These peptides are released into the water to help the starfish aggregate before spawning events. If true, it’s possible to use these peptides to build several mechanisms for controlling the COTS pests. Continue reading Using your own DNA against you: Bio-control of coral reef pest might be possible

racegenetics_cover_desat

How Science and Genetics are Reshaping the Race Debate of the 21st Century

by Vivian Chou figures by Daniel Utter Donald Trump’s election as the 45th President of the United States has been marked by the brewing storms of racial conflicts. A rise in racial incidents ensued in the immediate aftermath of Trump’s victory in November 2016. Since the beginning of 2017, over 100 bomb threats have been made against Jewish community centers and schools. Trump’s travel ban, signed in … Continue reading How Science and Genetics are Reshaping the Race Debate of the 21st Century

Min Ya Dicot

Dicot Leaf Epidermis

Lower leaf epidermis of the stonecrop plants showing puzzle shaped epidermal cells with scattered stomata. Stomata (singular: stoma) are like little mouths on the leaf surface, specialized in gas-exchange – CO2 enters a plant through them. The pairs of sausage-shaped cells, like the lips of these mouths, are “guard cells”, which guard the opening and closure of the stomata. In many flowering plants, the stomata … Continue reading Dicot Leaf Epidermis

MY SITN Aquilegia flower

The Birth of a Flower

Unlike animals, plants possess the ability to generate new tissues and organs throughout their entire lifespans due to the activity of stem cells located in specific sites termed meristems. During the reproductive phase, floral meristem (lower right dome-shaped structure) give rise to different floral organ primordia (the series of bulges), which will eventually grow into the sepals, petals, stamens, staminodia, and carpels of a beautiful … Continue reading The Birth of a Flower