Answer:
The first living things on Earth, single-celled micro-organisms or microbes lacking a cell nucleus or cell membrane known as prokaryotes, seem to have first appeared on Earth almost four billion years ago, just a few hundred million years after the formation of the Earth itself.
Answer:
b. Replicated chromosomes line up on the equatorial plate.
Explanation:
Mitosis starts with the breakdown of the nuclear envelop and condensation of chromatids into visible chromosomes. Since DNA replication has occurred during the S-phase of interphase, each chromosome has two sister chromatids held together by a centromere. A chromosome with two sister chromatids is said to be a replicated chromosome.
Metaphase of mitosis includes the alignment of replicated chromosomes at the cell's equator. The process is assisted by the spindle apparatus. This is followed by splitting of centromere and separation of sister chromatids during anaphase.
Answer:
<u>Option-(B): </u>The activation of a plasma membrane voltage gated sodium ion channel, leads to the process involving reverse calmodulin activity inside the muscles cells.
- As, the required number of energy is required for each break to bind the different proteins and other elements with one another in a proper sequence in order to have the activities inside the body.While, the enormous number of cross bridges are there inside the muscle cells to enhance its abilities to attain a proper position inside the space for a having the different chemicals in a more balanced level.
- As, we have heard of the balance been created between the different inside the human body to attain equilibrium, which is all due to termination of a certain process while initiation of another in the same space or system.
Areolar tissues are loose tissues that usually adhere to epithelia. Areolar tissues contain blood vessels(we know epithelial tissues don't have blood vessels). Their main role is to procure food for epithelial tissues.
