Vertebrates’ digestive tracts are sterile at birth. How do newborns acquire the necessary gut symbionts? Pick any two species to use as examples.
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Vertebrates’ digestive tracts are sterile at birth. How do newborns acquire the necessary gut symbionts? Pick any two species to use as examples.
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- In mammals , the evolution/ development of the organs of the digestive system is closely related to a) the release of inducer molecules by specific cells b) the specialization of epithelial cells of the endoderm c) the specialization of neurocytes from the ectoderm d) the specialization of stem cells from the mesoderm to from blood vessels e) all of these occur as the digestive system developsWhich of the following is an example of Mullerian mimicry? A A moth that appears to have large eyes on the back of its wings to ward off prey. B) A non-poisonous mushroom that looks almost identical to a poisonous mushroom. The yellow-black striped patterns of hornets and bees. An anglerfish that uses a bioluminescent light source as a lure for predators.Describe the parts of a cat and give their functions Epididymis Metanephric duct Perineum Cervix Ileocolic caecum Prepuce
- Make a table to identify amle and female homologues and describe it common function. Minimum of 7 organs.A farmer from India, Sanju Bhagat, lived his entire 36 years of life with a bulging stomach, and his condition had been a source of personal shame and misery. In June 1999, he was unable to breathe so he was immediately rushed to the hospital for emergency surgery. What the doctors saw inside his belly were fully grown limbs, hairs and long fingernails, parts of genitalia and jaws! His mother was said to have given birth to him during a blue moon. Could this have been the reason behind his condition?"While the aminotic egg offers many advantageous, it also has limitations. Which of the following is a limitation of reproduction in amniotes? External fertilization is not possible in amniotes. Amniotic eggs must be laid in water or the embryos will dry out before hatching. Amniotes must be smaller than non amniotes at hatching because of the difficulty getting oxygen through the external membranes.
- In the evolution of the vertebrates , the myocytes provide the stem cells for a) smooth mucscles that surround some of the capillaries to form arteries and veins b) inducing specialization of the ethodelial cells of the liver c) inducing the specialization of the ethodelial Beta cells of the pancreas d) inducing the speacialization of the epithelial cells of in the development of brain and spinal cord e) All of these are true1) The kidneys seen in the early embryonic development amniotes are similar to the kidneys of adult hagfish in many ways. Which of these does NOT accurately describe one of these similarities? A) Both have nephrons with funnels opening into the peritoneal cavity or coelem. B) Both rely solely on the metanephritc nephrons to produce urine. C) Both have pronephric tubules and mesonephric tubules. D) Both have pronephric (archinephric) ducts that empty into the cloaca.heck all the statements that can be attributed to the blastopore. A)it becomes the mouth in protostomes B)it can develop into the brain in some animals. C)it occurs in both protostomes and deuterostomes. D)it can develop into the gut in some animals. E)it is the opening to the archenteron F)it is the opening from the coelom to the outside of the animal. G)it becomes the mouth in deuterostomes H)it becomes the anus in deuterostomes
- A tapeworm that lives and sexually reproduces in the intestine of a bald eagle is transmitted when the tapeworm eggs are ingested by an aquatic damselfly larva, within which it changes form to become a cysticercoid larva. The infected damselfly is ingested by a fish, within which the cysticercoid remains viable and is transmitted to the eagle when it feeds on fish , thus completing the life cycle. What type of life cycle is this? a) direct b) predatory c) indirect d) convolutedUngulates Ungulates, such as deer, reindeer, and elk, are hoofed mammals. These animals have keen hearing, clear vision, supple, well-conditioned muscles, and razor sharp reflexes. The evolution of the four-chambered stomach in ungulates developed as a result of a need to eat quickly in the open and chew later in the safety of cover. This process is called ruminating or "chewing the cud." In other words, ungulates regurgitate and then re- chew their food. Which of the following would be considered a physiological adaptation of ungulates? A) their four-chambered stomach B) their long legs, which help them outrun predators C) their ability to stand perfectly still, which helps them avoid predators D) their ability to hibernate to avoid cold wintersExplain the presence of specialized digestive organs in the animals studied in this laboratory given that they all have a coelom and a complete digestive system with a separate mouth and anus.