Answer:
The noise of cracking or popping in our joints is actually nitrogen bubbles bursting in our synovial fluid
Explanation:
It is because synovial fluid lubricates your joints like motor oil in a car's engine, reducing friction and preserving our cartilage.
<u><em>PLS MARK BRAINLIEST :D</em></u>
• Homologous structures: Both Ostriches have wings similar in form to those of their ancestors, but that do not allow the birds to fly.
Homologous structures are those that have structural similarities but are different in function. For example, if we look at the anatomical structure of a bird’s wing, it is very similar in structure with a human arm. However, over the course of time they have evolved to perform different functions.
• Vestigial structures: The inner ear bones of mammals have evolved from bones that form the jaws of reptiles.
Vestigiality refers to the process in which some structure lose their function over the course of evolution in some specie but they are functionally normal in other species. Such a structure is the inner ear bones of mammals which donot perform an important function in mammals but do perform in reptiles.
• DNA sequence data: Both Genes involved in RNA replication are conserved among bacteria and animals, suggesting a common evolutionary origin.
The sequencing of genetic data is an excellent method of finding the evolutionary histories and relatedness of different organisms. This field of sciences is called phylogenetics and the mentioned example is the result of phylogenetics.
• Analogous structures: The jointed legs of insects and vertebrates arose independently, indicating a different evolutionary origin.
Analogous structures are those that have similar function but they look very different in structure or anatomy. This is because they have been evolved from different ancestors and perform different functions. One example of these structures is mentioned, The jointed legs of insects and vertebrates that look different bur perform same function.
Answer:
b. relatively short amplitude
Explanation:
c. relatively short wavelength
In simple terms, Cell Theory can be expressed as living organisms are composed and consists of cells and it arises from the surviving cells (existing cells).
<u>Explanation:</u>
Cell Theory:
- The term "Cell Theory" has created an impact in the biology field and it is now confirmed that cell provides the basic structure to the living organisms and Robert Hooke started doing researching about the cells.
Principles of cell theory:
The three principles to the cell theory are listed here,
- All organisms are made up of one or more cells.
- Cells arise from other cells.
- The Cell is the fundamental unit of structure and organization.
Contribution to Cell Theory:
- Schwann and Schleiden are the two scientists who discovered lots of information about the cells and they have contributed lots to cell theory.
- Schleiden states that every part of plants are consists of cells and he states that cells were done by the crystallization process.
- Schwann states that every part of plants and animals were consists of cells.
- Based on their contribution postulates of cell theory has been proposed.
<u>Types of cells:</u>
The cells are classified as Eukaryotes Cell and Prokaryotes Cell
- Presence of Mitochondria
- Presence of Cytoskeleton
- Presence of Membrane-bound Nucleus
Examples: Animals and plants
- Absence of Mitochondria
- Absence of Cytoskeleton
- Absence of Membrane-bound Nucleus
Examples: Bacteria
The brain of the cell most important