<h2>Kinase cascade </h2>
Explanation:
Normally, PK2 activates PK1
- PK1 and PK2 normally work sequentially in an intracellular signaling pathway
- If PK1 is permanently activated, a response is seen independently of whether or not PK2 is present
- If PK1 activated PK2, no response should be seen if PK1 were activated in the absence of PK2
- PK2 normally needs to activate PK1 for the cells to respond to the signal
- When PK2 is permanently activated in the absence of PK1, PK1 is not there to relay the signal
Answer:
one of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.
Explanation:
Answer:
this study is clearly an observational work
Explanation:
experimental studies involve to establish direct associations between a traits and its phenotypic effects. For example, a classical experimental study would involve to map a nonsense mutation in the ACTN3 gene significantly correlated to the non-sprinting phenotype
The statement 'a crocodile-like animal is the ancestor of birds' is BEST supported by the information in the table (option A).
- Evolution refers to the biological process of descendence with modification.
- Evolutionary close species share functional and structural phenotypic features due to a same-origin during evolution.
- A crocodile is a reptile, and it has been shown that birds evolved from theropod dinosaurs (reptile).
In conclusion, the statement 'a crocodile-like animal is the ancestor of birds' is BEST supported by the information in the table (option A).
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