Answer:
The continuity of life from one cell to another has its foundation in the reproduction of cells by way of the cell cycle. The cell cycle is an orderly sequence of events in the life of a cell from the division of a single parent cell to produce two new daughter cells, to the subsequent division of those daughter cells. The mechanisms involved in the cell cycle are highly conserved across eukaryotes. Organisms as diverse as protists, plants, and animals employ similar steps.
Genomic DNA
Before discussing the steps a cell undertakes to replicate, a deeper understanding of the structure and function of a cell’s genetic information is necessary. A cell’s complete complement of DNA is called its genome. In prokaryotes, the genome is composed of a single, double-stranded DNA molecule in the form of a loop or circle. The region in the cell containing this genetic material is called a nucleoid. Some prokaryotes also have smaller loops of DNA called plasmids that are not essential for normal growth.
In eukaryotes, the genome comprises several double-stranded, linear DNA molecules (Figure 6.2) bound with proteins to form complexes called chromosomes. Each species of eukaryote has a characteristic number of chromosomes in the nuclei of its cells. Human body cells (somatic cells) have 46 chromosomes. A somatic cell contains two matched sets of chromosomes, a configuration known as diploid. The letter n is used to represent a single set of chromosomes; therefore a diploid organism is designated 2n. Human cells that contain one set of 23 chromosomes are called gametes, or sex cells; these eggs and sperm are designated n, or haploid.
Explanation:
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Answer:
<em>Conjugation </em>
Explanation:
Conjugation is the method of moving genetic material from one bacterium to another via direct contact.
<em>One bacterium is the source of the genetic material during conjugation, while the other acts as the receiver.</em>
The bacterium of the recipient contains a sequence of DNA called the element of fertility or F-factor.
Answer: 1. b. species evenness, d. species richness. 2. resistance; resilience. 3. has extremely low species richness. 4. b. forest fire
c. volcanic eruption
d. flooding brainliest?
Explanation:
<span>An element is a pure substance that cannot be broken down into anything simpler by physical or chemical means.</span>
Answer:
The right approach will be "Natural selection".
Explanation:
- Natural selection seems to be a mechanism that persists and reproduces populations of organisms that seem to be better suited to applications, however those that are somewhat properly equipped die away.
- This demonstrates that organisms that really can respond to a given climate can rise in quantities and therefore will ultimately outperform certain species that are unable to respond significantly.
