Answer:
All viruses have is a protein coat and a core of genetic material, either RNA or DNA. Unlike bacteria, viruses can't survive without a host. They can only reproduce by attaching themselves to cells. ... Also unlike bacteria, most viruses do cause disease, and they're quite specific about the cells they attack.
:
The answer to complete this sentence would be ''herniated disk''.
D. In all four types of broth.
Explanation:
The plasmid will provide the origin of replication to the gene in question as it is a self-replicating body in the bacterial cell. The recombinant DNA technology is used for the purpose but here the plasmid itself has resistant gene for ampicillin and tetracycline.
The plasmid minus the eukaryotic gene can survive on all the media with or without antibiotics as it is resistant to both. In normal media, it will also survive and grow. So, colonies are seen after incubation in all the four media.
The plasmid is ampicillin resistant so grow in all the media.
The plasmid is also tetracycline-resistant so would grow in media having broth of tetracycline or both ampicillin and tetracycline.
Answer;
b. The cells appear well-defined, indicating the presence of cell walls.
Explanation;
Although, the overall function of the cell is the same, there are some important differences between animal and plant cells.
The first difference is that plant cells have an organelle called chloroplast. Chloroplasts contain a pigment called chlorophyll (which gives the plant its green color).
-Additionally, animal cells are smaller than plant cells and have a membrane around them that is flexible and allows molecules, gases and nutrients to pass into the cell. Plant cells are larger and in addition to a membrane they have a rigid cell wall. The cell wall does not let any material pass so instead the plants cells must have tiny openings between cells like doors between rooms in your house.
<span>The Cambrian. The Cambrian Explosion, which began roughly 545 million years ago, was a relatively rapid (~5-10 million years) diversification of multicellular life, including most of the animal phyla currently extant today. This was an evolutionary arms race of sorts, with many creatures achieving both larger size as well as symmetrical bodies and various structural supports, including skeletal systems. It was also a highly experimental times in terms of evolution, as many forms of creatures arose and went extinct in rapid succession during this period.</span>