parathyroid hormone (PTH)
a. Amphibians and birds share a more recent common evolutionary ancestor than sharks and birds.
b. Birds and sharks do not share a common evolutionary ancestor.
c. Having a bony skeleton did not provide an evolutionary advantage to sharks or ray-finned fish.
d. Rabbits and primates diverged more recently than crocodiles and birds.
Answer: a. Amphibians and birds share a more recent common evolutionary ancestor than sharks and birds.
Explanation:
A cladogram is a diagrammatic representation of the phylogenetic relationship of recently evolved species with their common ancestors. The relationship is defined on the basis of genetic, molecular, morphological make up of the organisms. The node in the cladogram defines a divergence or difference between the two taxon.
Birds and amphibians share a more recent common ancestor than shark and birds because they can be seen lying closer at the terminal ends of the cladogram.
Answer:
Delta fibers.
Explanation:
Myelinated fibers may be defied as the fibers that are covered by the myelin sheath. Three different classes of nerve fibers are group A nerve fibers, B fibers and C fibers.
Delta fibers are the type of group A fibers. These fibers are involved in the transmission of the acute pain information. The information is transferred from the sensory fibers to the central nervous system. These delta fibers can carry information faster and they are larger than the C fibers.
Thus, the correct answer is delta fibers.
A codon is a sequence of four nitrogenous bases.
B.
A codon is a sequence of three amino acids.
C.
In translation, an mRNA codon is recognized by its complementary amino acid.
D.
In translation, an mRNA codon is recognized by its complementary tRNA.
The statement which has been considered as true statement about codons is in translation, an mRNA codon is recognized by its complementary tRNA. Thus, option D is correct.
The anticodon of the tRNA hydrogen has been binds to the codon of the mRNA by the complementary base pairing. If the Codon of the mRNA is - 5' AGCTCA-3'. The anticodon of the tRNA would be - 3' GATCTG-5'
The events that has been occur during the eukaryotic translation elongation are codons in the mRNA are recognized by rRNAs, and tRNAs add the amino acid to the polypeptide chain.
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Answer:
D in translation, an mRNA codon is recognized by its complementary tRNA
b. Mitosis.
c. Meiosis.
d. Transcription.
Alleles undergo segregation ispresent in the mitosis. The answer is B. The first stage is prophase. Thenucleolus disappears and the two centrosomes begin to form the mitotic spindle.The spindle xtends between two opposite poles f the cell. Next is the metaphase.The centromeres of the chromatid pairs align at the center of the mioticspindle. Then anaphase, the centromeres will split that separates the chromatidpair. In here, alleles are formed. They are now called chromosomes. The lastphase is the telophase. The chromosomes will then form a thread-like chromatinand for ache envelope, a nucleoli appears.