Answer:
Scientists think that foxgloves have evolved the poisons as an evolutionary adaptation and defense mechanism that provided them with better survival capacities.
As poisons are repellents which help the plants to repel any predator or attacker and enhance their survival. That is why scientists are of the view that old fox glove did not necessarily had this poison many hundred years ago but some how there would be facing harsh circumstances or alot of predators. Due to which, with the passage of time they developed these chemicals which enhanced their life time and survival chances.
Some poisonous chemicals from foxglove are:
- Deslanoside
- Digitoxin
- Digitalis glycoside
Hope it help!
Answer:
Visible Light Absorption
Atoms and molecules contain electrons. It is often useful to think of these electrons as being attached to the atoms by springs. The electrons and their attached springs have a tendency to vibrate at specific frequencies. Similar to a tuning fork or even a musical instrument, the electrons of atoms have a natural frequency at which they tend to vibrate. When a light wave with that same natural frequency impinges upon an atom, then the electrons of that atom will be set into vibrational motion. (This is merely another example of the resonance principle introduced in Unit 11 of The Physics Classroom Tutorial.) If a light wave of a given frequency strikes a material with electrons having the same vibrational frequencies, then those electrons will absorb the energy of the light wave and transform it into vibrational motion. During its vibration, the electrons interact with neighboring atoms in such a manner as to convert its vibrational energy into thermal energy. Subsequently, the light wave with that given frequency is absorbed by the object, never again to be released in the form of light. So the selective absorption of light by a particular material occurs because the selected frequency of the light wave matches the frequency at which electrons in the atoms of that material vibrate. Since different atoms and molecules have different natural frequencies of vibration, they will selectively absorb different frequencies of visible light.
C. It begins with 3/8 and 1/3, and we need to make it 5/8 and 2/3, and the one that does that is C.
Answer:
The trees rustled as the wind whistled gently through the leaves- The noises are considered imagery.
Her mouth watered and her tongue burned as she bit into the spicy sandwich.- Considered taste imagery because it is describing what the girl is doing.
The golden rays of the setting sun reflected upon the clear waters of the lake. - Visual imagery
My toes went numb and a shiver ran up my spine as I stepped into the cold water.
The stench of rotting garbage overpowered me when I opened the bin.
Hope these are correct :)
Answer:
Formation of the planets. The various planets are thought to have formed from the solar nebula, the disc-shaped cloud of gas and dust left over from the Sun's formation. ... These rocky bodies would become the terrestrial planets (Mercury, Venus, Earth, and Mars).
