Toe nails are made of keratin
Answer:
Simple organisms, such as theamoeba and earthworm, have a moist, permeable external surface. Oxygencan pass into them through this surface by diffusion. A large surface area is needed for effective gas exchange - so larger, more complex, organisms have special organs such as gills and lungs.
Explanation:
Answer: D
Explanation: ) The predatory bacterium Bdellovibrio bacteriophorus drills into a prey bacterium and, once inside, digests it. In an attack upon a Gram-negative bacterium that has a slimy cell covering, what is the correct sequence of structures penetrated by B. bacteriophorus on its way to the prey's
(つ ^-^ )つ Hey There!
Answer : Groundwater is generally much cleaner than surface water. So ✨Yes✨
Why : Groundwater is less susceptible to pollution than surface water because as water enters the ground, the soil and rocks naturally filter much of the water as it passes through the ground.
✨Hopes this Helps!✨
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In passive transport, molecules are moving from areas of high
concentration to areas of low concentration. Examples: diffusion,
osmosis (water). Protein channels and carriers are sometimes also
involved in passive transport. </span>
