Answer:D) The starch adapted flies and maltose adapted flies are not different species but a reproductive barrier is forming between the two populations
Explanation: differences have accumulated within the populations to isolate them reproductively. The flies have chosen to mate with those like them.
 
        
                    
             
        
        
        
Answer:
b. nails instead of claws on their fingers and toes
Explanation:
Primates are a class of mammals in which humans are included. It is a very varied group, ranging from 30 gram lemurs to over 200 kg gorillas.
This group of animals is characterized, among other things, by having five fingers at its ends. They have clavicle, binocular vision, orbits surrounded by bone, etc. The vast majority have nails instead of claws, opposing thumb and vision that captures all colors.
Unfortunately, it is a very threatened order, as 60% of the world's primates could disappear within 25 years. This is all the fault of one species: the human.
 
        
             
        
        
        
Explanation:
 The synthesis of carbon dioxide and water is purely catalyzed by light energy from the sun. The light energy is used to synthesize useful organic molecules and produce oxygen gas. 
- Photosynthesis is light catalyzed. 
- Green plants manufacture their food using sunlight. 
- A special pigment in plant called chlorophyl traps the sunlight. 
- Carbon dioxide and water will react when the light energy from the sun is made available in plant leaves. 
- This will then produce organic compounds with rich chemical energy. 
- Oxygen gas is given off as a by product. 
Learn more: 
Photosynthesis and respiration brainly.com/question/3437832
#learnwithBrainly
 
        
             
        
        
        
This question is long and it is late here, but I can help you understand it. DNA consists of 4 nucleotide bases: Adenine (A), Thymine (T), Cytosine (C), and Guanine (G). When DNA is transferred to RNA, you use the complimentary nucleotide base to each as follows: 
Adenine changes to Uracil (replaces Guanine in RNA)
Thymine changes to Adenine 
Cytosine to Guanine and vice versa
So, the DNA code ‘TAC’ will have the mRNA complimentary strand of ‘AUG’. When changing mRNA to tRNA, you do as follows:
Change A to U
U to A
C to G
G to C
It’s that simple. Then, to change to amino acids, you need to use the codon chart attached (a codon is 3 nucleotide base pairs)
For example, mRNA codon AUG codes for the amino acid Methionine. Hope this helps.