Answer:
Bridgham et al. (2006) showed that the interaction between a steroid hormone (aldosterone-M) and its receptor (mineralocorticoid) evolved by Darwinian gradualism. In this work, the authors demonstrated a primitive affinity between the hormone and its receptor that was initially present in chemically similar but more ancient ligands. This result has implications in understanding the association between gene duplication and the evolution of hormone signaling pathways. For example, in invertebrates, this work reinforces the importance of gene duplication in the existing interaction between paralogous glucocorticoid receptors and their receptor mineralocorticoid genes that were derived from duplication (Thornton 2001).
The publications above cited are the following:
J.T. Bridgham, S.M. Carroll, and J.W. Thornton (2006). Evolution of hormone-receptor complexity by molecular exploitation. Science, 312(5770), 97-101.
JW Thornton. Evolution of vertebrate steroid receptors from an ancestral estrogen receptor by ligand exploitation and serial genome expansions, Proc Natl Acad Sci USA (PNAS), 2001, vol. 98 10 (pg. 5671-5676).
Answer:
the younger rock is on the top because that is where the newer rocks form the older rock is on the bottom
Explanation:
Answer:
The ozone layer in the stratosphere blocks out the sun's deadly ultraviolet rays. It acts as our planet's natural sunblock.
The DNA synthesis process is continuous on one strand while discontinuous on the other because of the fact that the DNA polymerase can add new nucleotides to the newly replicated strand only at the 3'end. The two strands of the DNA are anti-parallel, and so during the process of replication the DNA polymerase only works by adding new nucleotide from the 3' end. This leads to the synthesis of a continuous strand on one template stand, and the formation of the okazaki fragments on the another.
Hence, the correct answer is 'Option B and Option D'.
I think that its A. acquiring energy
I hope this helps ^-^
(let me know if im wrong)
