Answer:
The functions of blood are ;
- They carry cells that help fight pathogens .
- Regulate blood temperatures
- Prevent blood lose
- Transport of waste tot he liver and kidney for cleansing
Explanation:
Blood carries white blood cells which helps in fighting of pathogens to keep the bod immune from infections .
Blood adjusts to environmental temperatures to keep the body either warm or cold.
When a person gets injures , blood avails platelets to the surface , which in turn hardens to form a clot on the wound hence prevent blood lose .
Acidosis, the pH of a human should be 7.4 and never lower than 7.35
A phylogeny of the same taxa based only on morphological traits:
Some highly conserved genetic sequences can result in unrelated species appearing closely related in a molecular phylogeny, and not reflect the same pattern as the morphologic phylogeny.
Gene sequence changes may not result in morphological changes.
Gene sequences always provide more data than morphological traits.
Morphological analyses always provide more data because each morphological trait is the result of the expression of many genes.
The molecular data may be based on the analysis of introns, which aren't expressed and don't contribute to the evolutionary history of a group of taxa.
Why is molecular data more accurate?
Phylogenetic trees reconstructed from molecular sequences are often considered more reliable than those reconstructed from morphological characters, in part because convergent evolution, which confounds phylogenetic reconstruction, is believed to be rarer for molecular sequences than for morphologies
Learn more about molecular data :
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Answer:
There are prion-like particles in the brain normally, and when these become abnormal they can cause disease. (Ans. A)
Explanation:
Prions are proteins which can trigger normal proteins to fold abnormally, and they are present in the brain. They are causing many types of neurodegenerative diseases in both humans and animals. Which are known as transmissible spongiform encephalopathies.
Prions can enter the brain with the help of infection, also can arise from the gene mutation that encodes the proteins, and sometimes this affects humans by infected meat.
If a person infected from prion disease, it affects central nervous system tissues like brain, eye tissues and spinal cord.
