3. A. They help separate the chromosomes
Spindle fibers attach to chromosomes and pull them towards different poles of the cell during the final phases of mitosis. The result is two identical cells with the same chromosomes.
4. C. A cell plate
A cell plate is a structure found in plant cells on the top and bottom of the cell. It is a perforated wall made of cellulose and it allows for substances to move in and out of the cell, as the outer most layer of a plant cell, the cell wall, is impermeable.
option B both sexually and asexually
Explanation:
Algae regenerate by sexual reproduction, involving male and female gametes (sex cells), by asexual reproduction, or by both ways. Many small algae reproduce asexually by ordinary cell division or by fragmentation, whereas larger algae reproduce by spores. ...
At an inhibitory synapse (IPSP), the postsynaptic membrane experiences all of the above and is denoted as option B.
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What is Hyperpolarization?</h3>
This is described as the opposite of depolarization and involves the cell's membrane potential being more negative.
At an inhibitory synapse (IPSP), the postsynaptic membrane becomes hyperpolarized which is characterized by an increase in permeability to both Na and K.
Read more about Hyperpolarization here brainly.com/question/8837605
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Besides his work on universal gravitation (gravity), Newton developed the three laws of motion which form the basic principles of modern physics. His discovery of calculus led the way to more powerful methods of solving mathematical problems. His work in optics included the study of white light and the discovery of the color spectrum. It was his experiments with light that first made him famous. ☺
Answer:
B. Hermit crabs and fish that hide in shells compete with each other for shelter.
Explanation:
Hermit Crabs hides from their predator by hiding in old seashells (e.g those of gastropods) for protection and/or shelter. This is a form of camouflage exhibited by hermit crabs for survival. Now, if peradventure some species also uses the same mechanism for adaptation and survival, vigorous competition will sets in between hermit crabs and those species because the availability of empty shells ata ny given place depends on the relative abundance of gastropods which is crucial for the survival of both organisms from their predators. Sometimes, they may even have to fight or kill a competitor in order to gain access to the shell that favors them.