Answer:
Promoter sequences are DNA sequences that define where transcription of a gene by RNA polymerase begins. Promoter sequences are typically located directly upstream or at the 5' end of the transcription initiation site.
Explanation:
If the cell membrane were not selectively permeable, then unwanted substances would transfer through instead of being blocked out. Think of it like this: you have a sifter with various sizes of spice in it. You only want the finer grains of spice in your food, so when you shake the sifter, the larger pieces of spice don't fit through the small holes that only allow fine grains. Then you are left with the small spices in your food and the large ones stuck in the sifter.
Hopefully this helps and I wasn't too confusing :)
An echinoderm uses its tube feet for attachment and feeding.
Explanation:
- Tube feets are usually considered as locomotory organ of Echinoderm.
- They have tube feets arranged around their oral groove.
- These tube feed help the organism to push the food into the oral groove.
- Tube feets also help the echinoderms to attach themselves to the floor of the ocean and locomote slowly in a sliding manner.
Answer:
Vegetative propagation
Explanation:
Vegetative propagation does not require seeds or spores. Instead, offspring grow from a part of the parent plant.
<span>Dutch biologist and microscope pioneer Antoni van Leeuwenhoek, bro.</span>
