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Damage to the amygdalas may make a pearson fearless. Gleb Shumyatsky's lab reported in an article in Cell (2005) that knock out mice [mice lacking a specific gene] lacking the gene for stathmin were fearless. Stathmin is only transcribed and translated in the amygdalas, and the protein plays a role in microtubule formation. These fearless mice ventured into open areas and onto high platforms which normal mice avoid, because it exposes them to predators. They also failed to learn fear in classical conditioning experiments. If normal mice heterozygous for the fearless allele produce eight pups what number should be fearless?
Explain how early RNA molecules might have been able to respond to natural selection. Every RNA molecule might have competed with slightly dissimilar RNA molecules for nucleoti
Assessment You can observe it visually at birth. The anterior abdominal wall is absent and the posterior bladder lining which is bright red in colour is exposed. Urine seeps
why roots grow downword
Why is the cytoplasm of sperm cells very reduced? Why do mitochondria of sperm cells concentrate in the base of the flagellum ? The decreased cytoplasm of sperm cells reduces th
LIVING FOSSILS - 1. Limulus (King crab) Arthropoda 2 . Neopelina Mollusca 3 .
The heart is enclosed in a membranous sac called the pericardium. It has two layers- the fibrous pericardium which is the outer layer and the serous pericardium that lies inside th
what are the two main pollutants that contribute to acid rain
OVARIES - 2 in number (didelphic). White / pinkish. Almond like. 3 cm long, 2 cm wide, 1 cm thick. Lie in the lower part of abdomen attached to dorsal wall by mesovarium.
Define effect of Antioxidants on athletes? Antioxidants like ascorbic acid (vitamin C), tocopherols (vitamin E), selenium, glutathione (GSH) Supplementation (singly or in combi
What are the five conditons that can cause evolution to take place?
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