For number 1, you need the chart so I can't answer it. Sorry.
For number 2, your answer will be B because when he said "survival of the fittest", he meant that organisms with the correct adaptations for survival would live and reproduce, passing those adaptations down the line.
For number 3, your answer will be D because, like I said above, animals that have advantageous traits will survive and reproduce and pass along those traits. Which, essentially, is the process of evolution.
I hope I was able to help you. Best of luck!
Answer:
Orgasm
Explanation:
The orgasm is often considered as the peak of sexual excitement. It is a powerful feeling which gives physical pleasure and sensation and which also includes a discharge of accumulated erotic tension.
The complete sentence is -
Orgasm is a physiological reflex in which a massive discharge of nerve impulses occurs in the nerves serving the genitals, usually in response to tactile stimulation, causing rhythmic muscle contraction in the genital area and a sensation of intense pleasure.
Answer:
The conformational change in the G protein coupled receptor.
Explanation:
GPCR or the G protein-coupled receptor is one of the largest group of receptors in the eukaryotes.
The GPCR are seven-transmembrane receptors which are attached to the G proteins. The binding of the stimulus signalling molecules to the GPCR causes a conformation change in the GPCR. This conformational change in the GPCR disrupts the interaction between the G proteins and GPCR.
The change in the conformation of the receptor causes the dissociation of the G proteins and which can interact with other molecules of the membrane.
Thus, the conformation changes in the GPCR are the correct answer.
A short chain of the cyanobacterial cells found in the Bitter Springs Chert in northern Australia (about 1 billion years old). The bulk of modern genera really resemble cyanobacteria that are closely related to those that are living today. Unlike this fossilized cyanobacterium.
The fact that microorganisms can even leave fossils may surprise you. The oldest cyanobacteria-like fossils, which are among the oldest fossils ever found, are from the Precambrian, but one specific type of bacterium, the cyanobacteria or "blue-green algae," has left a fossil record that extends all the way back to that time. Larger than other bacteria, cyanobacteria have the ability to produce a thick cell wall. More crucially, cyanobacteria have the ability to form enormous, layered structures known as stromatolites or oncolites, depending on whether or not they resemble domes (if round).
Learn more about cyanobacteria, here
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Answer: B. beta
Explanation:
Sickle cell anemia is a inherited disorder which occur due to mutation of gene responsible for synthesis of hemoglobin protein. Typically the gene which is responsible for synthesis of beta-globin protein which make the beta chains in the hemoglobin is affected by the mutation. As a result of this the red blood cells acquire a shape of sickle rather than round. Pain, cold, stress, dehydration and illness are the symptoms associated with this disorder.