The answer is D: A gradual change in a species over time.
<span>No; the data in the table does not support Dr. Morris' prediction.</span>
“A carnivore eats both a
rabbit and a mouse in a food web” accurately describes a difference
between a food chain and a food web.
<span>A food chain is a series of events in which one
organism eats another and obtains energy. An example could be a forest
food-chain. The bear is the top of the food chain. The bear eats a coyote. The
coyote ate the rabbit. The rabbit ate the grass. Since the grass can't
technically eat anything, it's the bottom of the food chain and the food chain
ends. </span>
<span>A food web is a diagram showing the various
different plants and animals in an ecosystem in relation to each other. It
encompasses many consumers of each different level, acknowledging that one
predator may eat several different kinds of prey, and that one kind of prey may
be eaten by several kinds of predators. There are many food chains within a
food web, and one creature is not necessarily at the top of the hierarchy. </span>
The correct answer between all
the choices given is the second choice or letter B. I am hoping that this
answer has satisfied your query and it will be able to help you in your
endeavor, and if you would like, feel free to ask another question.
The answer its hybrid vigor
Answer:
Ion channel dysfunction
1) altered Cl- secretion in submucous glands,
2) increased Na+ absorption and consequent electrolytes hyperabsorption in the superficial epithelium.
Explanation:
The normal function of the CFTR protein is to transport Cl- ions as it works a chlorine channel regulated by AMPc and by protein kinase K (PKA). CFTR is also a regulator for other ionic channels.
The CFTR protein expresses in the luminal portion of the secretory and absorptive epithelial membranes. It has a significant role in the secretion of electrolytes activated by AMPc and intracellular calcium. This protein constitutes the way out of Cl- from the lumen. CFTR protein also regulates electrolyte function. It inhibits the epithelial Na+ channel of absorptive epithelial cells from the colon and aerial vias. It also activates the Na+ channel in sudoriparous ducts.
Given that defects in the CFTR protein take to a defective regulation in the Na+ channel, cystic fibrosis characterizes by alterations in electrolytes secretions and absorption. There are two significant physiopathological mechanisms:
1) altered Cl- secretion in submucous glands,
2) increased Na+ absorption and consequent electrolytes hyperabsorption in the superficial epithelium.
Patients with cystic fibrosis are incapable of increasing their secretory transport. Three events impede the higher osmotic transepithelial gradient:
- the increased epithelial conductance to Na+ in apical membranes,
- the paracellular permeability to Cl- and
- high permeability to water.
This leads to hyperabsorption in the patient epitheliums. The superficial liquid layer in the aerial vias decreases, mucous glands are not released from the mucus, and the mucociliary clearance is strongly altered in aerial vias.
