Answer:
A
Explanation:
A) all cells contain DNA, and DNA is all composed of adenine, thymine, guanine, and cytosine.
B) not all cells have a nucleus. For example, prokaryotes have no nucleus
C)Not all cells have a cell wall.(Animal cells don't)
D) not all cells have mitochondria (Prokaryotes don't)
Answer:
- Only some molecules move from a higher concentration to a lower concentration.
Explanation:
Selective permeability of the membrane means that membrane regulates which molecules (ions, substances) and how much of them can pass through it. Permeabilty of the membrane is determinated by its structure (hydrophobic heads and hydrophilic tails, cholesterol), temperature
The simplest form of transport through membrane is diffusion, passive transport of the molecule down its concentration gradient 9from higher to lower concentration). Some molecules can move down their concentration gradients directly, some have to pass through membrane proteins in a process called facilitated diffusion while others require energy and use active transport.
Any Changes on earth has its effect on life in general. Like rock reformation, volcanoes eruption and global warming made its impact on our environment. As earthquake or volcanoes occur it changes the formation of our earth causing ocean water to reach high tides can even cause tsunami’s in rare cases due to the intensity of the movement. Another example would be australia wild fires, this phenomenon caused people to evacuate, animals losing their habitat and making our air quality worse. It affects a lot more aspects in life and people in so many ways.
Answer:
mycelium, hyphae, coenocytic hope this helps out
Explanation:
