Answer:
there are tree hypothesis
Explanation:
There are several mechanisms by which multicellularity could have evolved:
1. A group of cells were added in a slug-shaped mass called grex, which was moved as a multicellular unit, as the Myxomycota do.
2. The primitive cell suffered an incomplete division of the cell nucleus generating a cell with multiple nuclei or syncytium. Next, membranes formed around each nucleus and the space was occupied by organelles. This resulted in a group of cells connected in an organism, an observable mechanism in Drosophila.
3. Daughter cells did not separate after cell division, resulting in a conglomeration of identical cells in an organism, which later developed specialized functions. This is observed in embryos of plants, animals and colonial cyanoflagellates.
Should read more about the topic here, google it:
<em>Multicellular development in a choanoflagellate; Stephen R. Fairclough, Mark J. Dayel and Nicole King
</em>
<em>In a Single-Cell Predator, Clues to the Animal Kingdom’s Birth</em>
Answer: D. Improved neuromuscular functioning
Explanation:
The neuromuscular functioning is one of the main reason for a person to become stronger, so the correct answer will be this one.
CAN YOU MARK ME BRAINLIEST?
Answer:
, tree rings usually grow wider in warm, wet years and they are thinner in years when it is cold and dry.
Explanation:
The correct answer is secondary structure of proteins is formed by the hydrogen bonding between amino acid chains.
Explanation:
The secondary structure of protein is generally stabilized by peptides bond along with hydrogen bonding between hydrogen atom and an electronegative atom such as oxygen.
The secondary structure both alpha helix and beta pleated sheet are stabilized by hydrogen bonding beside the presence of peptide bonds.
CREDIT: Pandeyarindam296
Because of the tortoises that were on the islands they had adapted to their surroundings for food so their necks got longer.