Answer: number 1
Explanation: that is when we could first sustain life because that is when we gained atmosphere and when we could hold carbon and oxogen
The two biggest reasons for children spending less time outside are the development of technology and the safety issues. The development of technology brought in our homes countless forms of having fun which is very important to children. The mobile phones, PC's, laptop's, tablets, Sony Play Station, as well as lots of technologically improved toys, made the children stay at home since they have the fun indoors, and not be interested in going outside and in nature. Also the safety issues in lots of parts in the world made the parents to restrict the children to the indoors environment.
Answer:
There are 4 main types of skin cancer:
Basal cell carcinoma. Basal cells are the round cells found in the lower epidermis. ...
Squamous cell carcinoma. Most of the epidermis is made up of flat, scale-like cells called squamous cells. ...
Merkel cell cancer. ...
Melanoma.
Explanation:
Plasma membrane,DNA,ribosomes,and ctyoplasm
Answer:
The correct answer would be "The sticky ends of fragmented DNA are joined with vector DNA".
Recombinant DNA or rDNA refers to the DNA that has been artificially formed by joining the fragments of DNA of two or more species.
The fragments are joined by creating the sticky ends in the DNA fragments.
These sticky ends are complementary to each other which helps the fragments to join to each other.
For example, the sticky end of a gene of interest and the sticky end of the vector DNA joined together to form a recombinant vector.
