(c) Vertebrate Embryos Q1. (a)List five similarities between the two embryos. a. General shape of presumptive head b. Shape and orientation of limb buds c. Presence and shape of the tail d. Appearance of somites on dorsal surface e. Placement of the eyes in relation to the rest of the head (b)Why might a chick embryo and a pig
Younger lionfish have a unique tentacle above their eye sockets, which differs in appearance between species, but studies show that this tentacle has evolved over time in each species serving to attract new prey. Juvenile lionfish eat mostly invertebrates, but shift their diet to fish as adults and eat reef fish. Adult lionfish spread their pectoral fins and use them to "herd" prey. This is a very effective predatory style because it is unfamiliar to native Florida fish. However, Lionfish can have negative effects on the overall reef habitat as they can eliminate organisms which serve important ecological roles such as herbivorous fish which keep algae in-check on the reefs.
Shubin shows how fin structures of fish like Tiktaalik mark the beginning of the evolution into the mammalian paw and opposable thumb structures in the hands of today’s primates. The significance behind Tiktaalik is how it proved to be the missing link which greatly shows the transition from fish who swim, to four-legged vertebrates. Neil also states that all creatures in the world are built similarly to one another. Creatures such as whales, birds, and humans have single arm bones that each lead to two others, that connect to fingers or our toes. In us humans, this shows up in the humorous, and they go through the radius and ulna into our wrist bones and fingers.
I would say that the common ancestor would have to be very similar to the two species because having only three locations where the amino acids are different means these species are very close to one another. The ancestor would probably be toward the top of the “tree of life” because this ancestor has similar amino acids with the two other species, so it’d have to be toward the top. Procedure Part A: Comparing Amino Acid Sequences in Hemoglobin Hemoglobin is the molecule in blood that carries oxygen. This complex molecule contains four protein chains. Figure 1 shows the amino acid sequence for one of those chains in eight mammals.
The Megladon fish has disruptive coloration, with its spots and stripes it is able to confuse their predators. The Megladon is usually all different colors. The coloration also gives off the warning of being poisonous or that they taste bad. The colored pigments in the fish are found in cells in the skin called chromatophores. The chromatophores allow the fish to rapidly change color by contracting and expanding the pigment in the chromatophores.
4 c. 6 d. 8 2. In the homologous pair of chromosomes above, which of the following is a gene? e. Earthworm tasting ability f. One thumb g. Both of the above h. None of the above 3. In the homologous pair of chromosomes above, which of the following is an allele? i. Earthworm tasting ability j.
Incorrect Points Earned: 0/1 Correct Answer: C Your Response: D 5. Although only about the length of a thumb, an embryo at week 8 has developed: A. toenails and fingernails. B. eyelashes. C. the wrinkled structure of an adult brain. D. all of its basic body structures (except for the brain).
Females who weigh around 230 g are much larger than males who weigh only about 41 g. Females also occupy a brighter tone of red and orange, with a pale undersurface. Because of their unique colour, predators perceive the Tomato Frog as toxic, a beneficial attribute to these frogs. Also, these frogs secrete a white substance from their skin to avert predators. However, this substance can trigger an allergic reaction in humans. Fully grown tomato frogs feed on small invertebrates and when under attack can enlarge themselves, appearing larger in