Do grizzly bears have DNA? “Just like humans, each bear has unique DNA,” the park service notes. “Biologists can collect DNA samples from hair and scat and use this DNA to estimate bear population size and the genetic diversity of bear populations. Samples can be collected at natural ‘bear rub’ sites or at hair traps […]
What is a flat bottomed flask used for?
What is a flat bottomed flask used for? Boiling, Distillation Florence flask/Uses What is the flask used for? Flasks can be used for making solutions or for holding, containing, collecting, or sometimes volumetrically measuring chemicals, samples, solutions, etc. for chemical reactions or other processes such as mixing, heating, cooling, dissolving, precipitation, boiling (as in distillation), […]
Do whales give milk to their babies?
Do whales give milk to their babies? To be more hydrodynamic, the mother’s nipples are inverted at the mammary gland until the baby starts to nudge where they then start to point out. The mom then starts to shoot out milk. Whales don’t have lips, so they can’t really suckle the milk. Instead it’s almost […]
What was the shared goal of a populist and a Granger?
What was the shared goal of a populist and a Granger? The frustrated farmers eventually organized around the Granger organizations in order to push for regulation of the railroads and their rates. Explanation: The idea of “Free Silver” (the open coinage of silver backed dollars, as opposed to those backed by more expensive gold) was […]
How did ancient India make their money?
How did ancient India make their money? Indian economy and trade India always made money from trade, because India is between China and West Asia and Europe. From the Harappan period on, Indian people were selling gold to West Asia, using their carefully made weights to weigh the gold out. Where did the first money […]
How are all halogens similar?
How are all halogens similar? Atoms of group 7 elements all have seven electrons in their outer shell. This means that the halogens all have similar chemical properties . What properties do Group 7 have in common? Elements in group seven have a number of similar properties, most importantly they have low melting and boiling […]
What animal can run longest distance?
What animal can run longest distance? 1. Ostrich. The world’s biggest bird is also the best marathon runner on the planet. While the official world record marathon time for a human is just below 2 hours, 3 minutes, an ostrich could run a marathon in an estimated 45 minutes, according to Popular Mechanics. Which animal […]
How does salt on meat preserves it from spoilage by bacteria?
How does salt on meat preserves it from spoilage by bacteria? Salt inhibits the growth of microorganisms by drawing water out of microbial cells through osmosis. Concentrations of salt up to 20% are required to kill most species of unwanted bacteria. Why is salt used to preserve meat? Salt is effective as a preservative because […]
What do painful nipples indicate?
What do painful nipples indicate? Nipples are sensitive, and they can hurt for lots of reasons. Tight clothes, rashes, and infections can all irritate the tender skin. For women, sore nipples are common during periods, pregnancy, and breastfeeding. Any pain in your nipples can make you wonder if you have breast cancer. Why are my […]
What is it called when plates are pulled apart?
What is it called when plates are pulled apart? Most geologic activity stems from the interplay where the plates meet or divide. The movement of the plates creates three types of tectonic boundaries: convergent, where plates move into one another; divergent, where plates move apart; and transform, where plates move sideways in relation to each […]