Photo 51, showing x-ray diffraction pattern of DNA
Photograph 51 is the nickname given to an X-ray diffraction image of DNA taken by Raymond Gosling in May 1952, working as a PhD student under the supervision of Rosalind Franklin,[1][2][3][4] at King's College London in Sir John Randall's group. It was critical evidence[5] in identifying the structure of DNA.[6]
A. Gliding Joint. (4)
B. Hinge Joint. (3)
C. Pivot Joint. (1)
D. Suture Joint. (2)
Answer:
C. They can grow to larger populations more quickly
Explanation:
Bacteria are the <u>key entities</u> of <u>biogeochemical cycle</u>s (Nitrogen, Carbon, Oxygen, etc.) on Earth. The strength of these cycles is typically achieved when they can multiply faster in a relatively <u>short time period</u>. If all bacteria on Earth start reproducing via sexual means only, then many of the biogeochemical cycles would take forever, thus <u>generating nutrients at a slower rate</u>. Since higher organisms (e.g. eukaryotes) depend on the abundant supply of nutrients, the overall life on Earth would be compromised to a larger extent in the absence of sufficient nutrients supply. Thus, it is <u>beneficial for all forms of life that bacteria reproduce mainly via asexual means</u>.
PS: A simple bacterium can produce millions of copies in 24 hours period.
Answer:
The scientific term for a living thing is a(n) <u>organism</u>.
All living things are <u>made up of one or more cells</u>.
The simplest level at which life exists is <u>cell</u>.
Example of a multi-cellular organism is <u>human beings</u>.
Example of a unicellular organism is <u>bacteria like E. coli</u>.
<u>Cell membrane</u> surrounds a cell and separates it from its environment.
All cells perform various jobs or <u>functions</u>.
No, all cells are not alike but these cells share some basic similarities. For example: Neuron is very different from that of epithelial cell but they both have nucleus and other membrane bound organelles.
Differences between unicellular and multi-cellular organisms are as under:
1) Unicellular organisms are simpler than multi-cellular organisms. Multi-cellular organisms are complex.
2) In unicellular organisms a single cell performs all the functions required to sustain a life while in multi-cellular organisms a group of one type of cells perform only one function and other function is performed by another group of cells. These group of cells meant for a specialized function is known as tissue. Various tissues in combination form an organ. Various organs collectively form an organ system. These various grades of organization and specialized organs perform various functions and the co-ordinated work of all the organ systems sustain the life of a multi-cellular organism.
3) Unicellular organisms are less efficient than multi-cellular organisms.
4) Unicellular organisms may be prokaryotic or eukaryotic but multi-cellular organisms are always eukaryotic.
The environment affected their farming as it was different
