D.
A fixed allele is homozygous within a population so D should be the correct answer.
Hope this helps!
" You Should go home, lay in bed, and try to block everything out while trying to sleep"
Answer:Enzymes that makes redox reactions possible in a biochemical process includes those that help to catalyze the transfer of electrons, atoms, or functional groups.
Explanation:
Here are some class categories of these enzymes and their roles ;
• Oxidoreductases - Transfer of electrons (hydride ions or H atoms)
• Transferases - Group- transfer reactions
• Hydrolases - Hydrolysis reactions (transfer of functional groups to water)
• Lyases - Addition of groups to double bonds, or formation of double bonds by removal of groups Transfer of groups within molecules to yield isomeric forms
• Isomerases - Formation of C-C, C-S, C--0, and C-N bonds by condensation reactions coupled to ATP cleavage
The above are however classified, given code numbers, and assigned names according to the type of transfer reaction, the group donor, and the group acceptor.
Answer:
Option-C
Explanation:
Scientists found a fossil of a fish with four limbs or legs. The fossil was estimated to be around 375 million years old.
The fossil showed the fins and scales of a fish but they also possess the bones of proto-wrist, shoulders and the elbow.
The presence of these bones can be a clue that the fish evolved the limbs to walk on the land and will later evolve into animals belonging to amphibians, reptiles and mammals. Therefore, the Tiktaalik is considered the missing link of how life evolved from water to land.
Thus, Option-C is correct.
