Answer is A - Cytosine can pair with guanine only.
It would not be the others because:
Base pairs are A and T/U, C and G.
B) Adenine does not pair with cytosine.
C) Adenine can pair with thymine, however it does not pair with cytosine.
D) Cytosine can pair with guanine, but does not pair with adenine.
Usually patient's with pica are missing a nutrient in their diet..blood testing is the usual method to discover what nutrients are missing.could also b due to a mental illness..
Answer:
I'm sorry but there is no picture above you-
Aquatic: external fertilization
terrestrial: internal f.
The question is incomplete as it is incomplete therefore a picture of the complete question has been attached.
Answer:
To be used by the cells for energy
Explanation:
The digestive process of humans digest or breakdown or oxidise the organic molecules present in the food to simple compounds which could be easily utilised by the human body.
The human body composed of tissue and cell requires energy to perform metabolic reactions in the form of ATP which are provided by the digestion of the complex food material.
The macronutrients present in the food thus are digested and absorbed by the cells to perform reactions which could provide energy therefore the selected option is the correct answer.