Life is a characteristic that distinguishes physical entities that have biological processes, such as signaling and self-sustaining processes, from those that do not, either because such functions have ceased or because they never had such functions and are classified as inanimate.
The roots of inheritance may extend beyond the genome, but the mechanisms remain
a puzzle. As a postdoc in Kerry Ressler’s laboratory at Emory University in
Atlanta, Georgia, Brian Dias had spent much of the two years before his son’s
birth studying these kinds of questions in mice.
Bill Nye and Ken Ham debated the origins of life last night live from the Creationist Museum in Kentucky. The great success of the debate was to inform and raise awareness of how vital science is to our future.
Each mammalian cell has the same genes, yet performs distinct functions. This is
achieved by epigenetic control of gene expression; the switching on and
switching off of genes. This course will cover the principles of epigenetic
control of gene expression, how epigenetic control contributes to cellular
differentiation and development, and
Something has always troubled me about Darwin’s theory and even modern revisions
of his work – there is still no explanation for instinct. Ethologists call
instincts innate releasing mechanisms or IRM, which in layman’s terms means
“we’ll use big fancy words because we just don’t know.” The
Bilateral symmetry in an organism means that one half is roughly a mirror image
of the other half. The plane of symmetry is the sagittal plane (vertically
through the head and body, with one of each sense organ and limb pair on either
side). It’s not a perfect match