Answer:
mountains and rivers because a geographical barrier can be a mountains range, a large canyon, a body of water
Answer: nucelotide
Explanation: Rna and dna are made up from nucelotides, they each have a five carbon sugar backbone, a nitrogen base and a phosphate group
The invading bullfrogs ARE HARMFUL. This is because, they cause decline in the population of the native species.
Decline in the population of the native species will throw the ecosystem into a condition of imbalance which will eventually affect all the living organisms that are living in that ecosystem.
Answer: premaxilla bone (or maxilla) and the maxillary beak (or rhinotheca).
Explanation:
The beak is composed of keratin, the same tough, insoluble protein found in fingernails, hoofs, antlers and horns. A bird's bill comprises two parts. The upper portion of a bird's bill is called the maxillary rostrum, which consists of the premaxilla bone (or maxilla) and the maxillary beak (or rhinotheca).
The mRNA strand is complementary to the DNA template strand; however, uracil instead of adenine is paired with thymine best describes the model of the mRNA strand being transcribed.
<h3>What is mRNA?</h3>
This is referred to as messenger RNA and is a type of single-stranded RNA which is involved in protein synthesis. It carries the genetic information needed to make proteins and is complementary to the DNA template strand.
It however has a different base pair to DNA such that uracil instead of adenine is paired with thymine.
This base pair difference is therefore described as the most appropriate choice in the description of the mRNA strand.
Read more about mRNA here brainly.com/question/12388408
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