The correct answer is that a butterfly and an octopus do not have Carnegie stages of development, while elephants and turtles do. This is because Carnegie stages of development are stages found only in the development of the vertebrate embryo. Carnegie stages can be defined as a system in embryology, which include 23 stages of the embryonic development, each characterized with the different age, size and morphologic characteristics of an organism.
Answer:
C - To carry nutrients to cells and wastes away from cells
Explanation:
good luck with that,,, Blood vessels, veins, and arteries are located all over the body, and most notably carry oxygen to cells and CO2 away from cells as waste.
Answer:
Half show the wild-type phenotype and half show the mutant phenotype.
Explanation:
The dominant mutation means that the mutation can express itself even in the heterozygous condition as well. The cross between homozygous unaffected wild type (aa) is crossed with the heterozygous (Aa) is as follows;
Parents aa × Aa
progeny: Aa, Aa ( affected ) and aa, aa (unaffected).
Thus, 505 individual are unaffected and 50% individual are affected.
Hence, the correct answer is option (B).
Answer:
Since this is old, im just gonna get these points, don't wan't them to go to waste lm.ao
Explanation:
Answer:
A) many noncoding stretches of nucleotides are present in mRNA.
Explanation:
A transcription unit in eukaryotes includes the region that code for mRNA extending from the 5' cap site to the 3' poly-A site. It also includes the controlling regions. The mRNA formed by transcription also has some non-coding intervening sequences. These are called introns. Introns are removed from the primary transcripts by the process of splicing that occurs after transcription.
Therefore, a transcription unit that is 8,000 nucleotides long may use only 1,200 nucleotides to code for a protein having 400 amino acids since the rest of the nucleotides are part of introns and are removed from mRNA after transcription.