Helper T cells <span>are required for almost all </span>adaptive immune responses<span>. They not only help activate B </span>cells to<span> secrete antibodies and macrophages </span>to<span> destroy ingested microbes, but they also help activate cytotoxic </span>T cells to<span> kill infected target </span>cells<span>.</span>
Answer:
Over 800,000
<em>Arthropods are found in all parts of the world in a wide variety of environments, from the deep sea to the frozen arctic regions. Over 800,000 species of arthropods have been identified, but scientists estimate that there may be tens of millions of species in this phylum, many of them yet to be discovered!</em>
Explanation:
correct me if im wrong
1.) A nucleotide of DNA consists of a sugar, a phosphate, and a nitrogen containing base.
2.) A mutation is a change in the base sequence of a DNA molecule
Hope this helps!
The Coronary Arteries vessel directly supplies the Hear muscle with Blood.
Answer:
The correct answer will be-
1. Weed- 40%
2. Fruit fly- 60 %
3. Mice- 97.5 %
4. Chimpanzee-98.5 %
Explanation:
Charles Darwin suggested that all organism on earth have descended from a common ancestor. The modern technology-enabled humans to sequence the genome of an organism and compared them with each other.
When the human genome was compared with the genome of other organism found the similar sequences in them like - Weed shared 40% of the genome with humans, fruit fly shared 60% genome, mice showed 97.5% genome similarity and chimpanzees showed 98.5 % with the human genome.
On the basis of this, the chimpanzee was found to be the closest species to humans
