Robert Hooke observed the cells through a combination of lenses.
After Robert Hooke, the development of microscopy take place. After the development of the microscopy, scientist were able to observe the features of the cell. In order to formulate a cell theory observation of most of the cells was necessary. So, it was necessary to observe different types of cells from different organism. So, the advancement of the microscopy and observation process required for the formulation of the cell theory was the reason for the delayed development of the cell theory.
Answer:
Explanation:
1.) All organisms differ in traits such as size and behavior.
2.) No two individuals are exactly alike.
3.) There was a gradual change in each species.
4.) Fossils were different from the living animals. However, these fossils had many similarities to modern forms of life.
5.) Species on the Galapagos Islands resembled species on the mainland but they were different in certain characteristics.
6.) Some organisms became isolated on many islands.
They are called sacromeres.
The answer is letter c. produces protein.
<span>Water, ions and molecules requires for cellular processes, can leave and
enter cells through a passive process like diffusion. Diffusion is random
movement of molecules yet has a net direction to regions of lower concentration
in order to reach a balance. Simple passive diffusion takes place when small
molecules pass through the lipid bi-layer of
a cell membrane. Depending on carrier proteins, facilitated diffusion is
imbedded to allow certain substances to pass through, which may not be able to
diffuse through cell membrane.</span>
Answer:
1) option A - 5' TAG CTG GTA 3'
2) Option C - regulates which materials enter and leave the cell
3) option B - heredity information
Explanation:
For question 1) The complimentary strand will read in opposite direction 5' to 3', and will have each base replaced by its specific base pair:
Adenine (A) replaced by Thymine (T)
Guanine (G) replaced by Cytosine (C)
Thus, the complimentary strand of 3' ATC GAC CAT 5' read as 5' TAG CTG GTA 3'
For question 2)
Cell membrane is a flexible membrane made up of proteins and lipids, and is role is to
- select the materials absorbed by the cell
- protects the cell
For question 3)
DNA stores hereditary information along its sequence in form of genes, that are passed down to offsprings, and determine their traits/behavior
