Sperm cells inside the pollen grain travel down the pollen tube and into the ovary which contains the ovules. Fertilization occurs when one of the sperm cells fuses with the egg inside of an ovule. After fertilization occurs, each ovule develops into a seed. When and where does pollination takeRead More →
Both longitudinal (e.g., sound) waves and transverse (e.g., water) waves can form standing waves. This section focuses on waves in bounded mediums—in particular, standing waves in such systems as stretched… Can transverse waves Superpose? Due to “Superposition” principle, any particle in atmosphere handle each of these two waves separately. …Read More →
Their results, published this week in the journal Toxins, defy the recent abandonment of historic advice, and suggest that man o’ war stings are no different than other jellyfish stings; the best first aid is to rinse with vinegar to remove any residual stingers or bits of tentacle left onRead More →
Earthquakes occur along fault lines, cracks in Earth’s crust where tectonic plates meet. They occur where plates are subducting, spreading, slipping, or colliding. As the plates grind together, they get stuck and pressure builds up. Finally, the pressure between the plates is so great that they break loose. Do TransformRead More →
Injury near the brainstem and high pressure within the brain can lead to bradycardia (decreased heart rate), as well as bradypnea. Some other conditions that can lead to bradypnea include: use of sedatives or anesthesia. lung disorders such as emphysema, chronic bronchitis, severe asthma, pneumonia, and pulmonary edema. What isRead More →
Earthquakes occur along fault lines, cracks in Earth’s crust where tectonic plates meet. They occur where plates are subducting, spreading, slipping, or colliding. As the plates grind together, they get stuck and pressure builds up. Finally, the pressure between the plates is so great that they break loose. Do TransformRead More →
Although waterspouts are not as destructive as their land based cousins their ability to carry anything in their path makes them dangerous to vessels and small craft. Not only can waterspouts cause havoc to mariners, they can devastate coral reefs and marine organisms that are close to the waters surface.Read More →
Hydrogen bonding occurs only in molecules where hydrogen is covalently bonded to one of three elements: fluorine, oxygen, or nitrogen. These three elements are so electronegative that they withdraw the majority of the electron density in the covalent bond with hydrogen, leaving the H atom very electron-deficient. Does hydrogen bondingRead More →
As your location on Earth rotates into sunlight, you see the sun rise. When your location rotates out of sunlight, you see the sun set. Imagine if the entire Earth had a single time zone. … Since different parts of Earth enter and exit daylight at different times, we needRead More →
ions of two compounds exchange places in an aqueous solution to form two new compounds. How are most decomposition reactions initiated? A source of energy. What is typically required for most decomposition reactions to occur? While there are many forms of energy (such as sound, electrical, and nuclear energy), decompositionRead More →