Answer: Biodiversity loss will lead to a deterioration of ecosystem services, increasing the likelihood of ecological surprises—with negative impacts on human well-being. ... But social relations can also be harmed by reduced ecosystem cultural services, such as the loss of iconic species or changes to highly valued landscapes.
Explanation:
Answer:
Decreased transcription of structural genes of try operon irrespective of presence or absence of tryptophan. The leader sequence has a tryptophan codon in its sequence 1 that does not allow the formation of attenuator structure when tryptophan levels are low.
Explanation:
The leader peptide has a tryptophan codon in sequence 1. When tryptophan levels are low, translation of sequence 1 pauses at the tryptophan codon and the sequences 2 and 3 pair with each other. This does not allow pairing of sequences 3 and 4 and the formation of the attenuator is inhibited. Therefore, tryptophan operon is expressed when tryptophan levels are low.
When the leader peptide sequence is replaced with the one from phenylalanine operon, expression of tryptophan operon will be reduced. The replaced sequence lacks a tryptophan codon and therefore, the translation would not pause when the tryptophan levels are low. This would allow the ribosome to quickly translate the sequence 2. Sequences 3 and 4 will pair to form attenuator and the gene expression will be reduced irrespective of low levels of tryptophan.
Answer:
F
Explanation:
The blood disease Sickle-cell anemia is caused by a simple substitution mutation. In the mutation, a single nucleotide is replaced in the portion of DNA which codes for a unit of hemoglobin.
Answer:
The correct answer is arteries.
Explanation:
The ventricles refer to the lower two chambers of the heart. The prime function of the ventricles is to pump blood to the rest parts of the body. Arteries refer to the vessels, which will be the first one to come in contact with the blood from the ventricles.
Arteries are the blood vessels, which mediate blood away from the heart to the other parts of the body like tissues and lungs. The arteries are strong, thick, and exhibit elastic walls. The distinct types of arteries comprise elastic arteries, muscular arteries, and arterioles.
Answer:
D. nothing of all
Explanation:
Karyotype is defined as the process through which photographs of chromosomes are taken and chromosomal structure is studied.
Karyotype do not give any information regarding gender or genes location as karyotype only give information about the number of chromosomes, size or length of chromosome, banding pattern, and the position of the centromeres.
Karyotypes can give information such as chromosomal disorder, taxonomic relationships, and cellular function.
Hence, the correct answer is "D. nothing of all".
