Cell growth and reproduction is guided by the genetic code present in the DNA strands of the cell. These DNA strands form genes, which are packaged in chromosomesKnow More
Reproduction can be either sexual or asexual. In asexual reproduction, a single set of genetic information is replicated in an identical cell. The first step is the copying of a second set of chromosomes identical to the first in the cell nucleus. These two set then latch onto opposing sides of the cell. The cell membrane on these opposing sides continues to constrict until the cell is cleaved down the middle. This method of reproduction produces an offspring that is a perfect clone of the organism. It is the only means of reproduction in single-celled organisms. Some multicellular organisms, such as starfish, can also reproduce this way.
Sexual reproduction results from the joining of two specialized reproductive cells, such as sperm and ova. The advantage of this form of reproduction is that it introduces a larger pool of genetic diversity, as the offspring has two sets of DNA instead of the single set that is copied in asexual reproduction. Reproduction through sexual means involves the cells undergoing a complex replication and division process called mitosis.Learn more about Cells
The cell wall of plants is a tough, yet flexible layer that surrounds the cell membrane. It has many functions, but its main function is to give the plant cell rigidity and strength.Full Answer >
According to Reference.com, cellular organisms that do not have a distinct nucleus, such as bacteria, are called prokaryotes. They are distinct from the eukaryotes, which are the cellular organisms that contain a nucleus.Full Answer >
Mitochondria are the powerhouse of the cell. These structures are nicknamed the powerhouse of the cell because they work to convert energy into forms that the cell is able to use.Full Answer >
A cell membrane is a thin layer that acts as a barrier that separates an individual cell or a cellular compartment from other surrounding structures. This dynamic layer plays an essential part in the transport of ions and nutrients.Full Answer >