Answer:
This is because of how reproduction works in humans. Male and female sex cells are formed by a process called meiosis, where the diploid chromosomes divide and separate. And so the ratio of male to female births is also 50:50.
Answer:
Adenine on one strand can pair only with thymine on the other strand; cytosine, only with guanine.
Explanation:
DNA nucleotides can contain one of four nitrogenous bases. These bases are adenine (A), thymine (T), guanine (G) and cytosine (C). The two strands are held together through hydrogen bonds that form between the nitrogenous bases. Adenine (A) forms bonds with thymine (T) while cytosine (C) forms bonds with guanine (G); A only ever pairs with T, and C only ever pairs with G.
Animal Types and Characteristics
Mammals:body covered by hair or furwarm-bloodedhave a backboneproduce milk
Reptiles:body covered by scalescold-bloodedhave a backbonemost lay hard shelled eggs on land
Birds:body covered by featherswarm-bloodedhave a backbonelay eggs
Insects:most are small air-breathing animals6 legs2 antennae3 body sections (head, thorax, abdomen)Spiders:also termed arachnids8 legs8 eyesthey spin webs
Aquatic Animals:most have gillsfound in lakes, rivers, and oceans
Answer:
i think its D bec b and c not it
I am not sure if I am right but, I think it is called the desertification process.
