Acorn Barnacles Lab Report

In our fourth and final lab for Biology 100, we are dealing with the beetle larva mealworms. This worm-like animal is, in fact, not a worm; they are larva for the tenebrionid beetle. These larvae are most commonly used in order to feed household pets. For example: reptiles, fish, and birds. Tenebrio larvae are also considered pests to the most businesses.

The purpose of this lab was to save a little gummy worm named Sam from drowning. In addition, one of the labs key terms was a hypothesis which is a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation. Furthermore, we also learned that an independent variable is a factor that is changed during the experiment. On the other hand, the dependent variable is the factor that is observed or measured during the experiment. To begin with, the experiment the hypothesis formulated was if we reshape the paperclips into hooks and pick up sam, and the lifesaver (without touching them), then the lifesaver would be stretched enough for Sam to go through it.

The objective of the lab was to analyze the formation of pelvic structures from two populations of stickleback fish collected from two different lakes. This was done in order to formulate a question based on observable phenotypic differences in twenty specimens from two different lake populations. Careful measurements were taken including the lateral plate, pelvic girdle expression, and body depth sizes. The purpose of the research was to formulate a question and develop a hypothesis based on the variations observed between several selections of populations, in order to gain a better understanding of evolution and natural selection. The data collected was used along with information about the lakes to suggest possible environmental factors

This investigation was constructed to determine how the Acorn Barnacles respond when the current is changed in their environment. The hypothesis was that if barnacles are placed in a small cup and the current of the water changed, then the barnacle activity will decrease because the current with slow them down. The outcome of this investigation supported the hypothesis.

An association between enzyme production, gene copy number, and gene evolution was explored by conducting analysis of the salivary amylase enzyme, AMY1A gene copy number, and the ancestral starch consumption in Homo Sapiens (Tracey 2017, p.22). It was hypothesized that the relative amount of starch consumption was very high for my personal ancestral diet, thus my AMY1 diploid gene copy number in my genome and salivary amylase concentration would be significantly higher than the population mean. With a population of 28 subjects (n=28), individual saliva samples were collected and compared to a calibration curve to determine the approximate amylase concentration by analyzing absorbance values. Individual samples of buccal cheek cells were

Construction of each substrate: Rock Crevice: The rock crevice used four rocks to make a crevice shape Rock Structure: The rock structure was made of three rocks, two rocks on the bottom level and one resting on top of the others to make an overhang. Seaweed: Find a small bunch of Bladderwrack-Fucus seaweed and weigh it down with a small rock so it does not disturb the other substrates. Shells: Collect periwinkles (both smooth and common), dogwhelks, and a mussel or clam to make up the shell area.

Clumps together, ability to keep water in its shell and release it as needed to stay moist

A male Betta is to be placed on the opposite side of the bowl, so that they can see each other but no contact. The fish were observed for two minutes. After the two minutes passed, the barrier was lifted and observations were recorded for one minute before the male was removed from the bowl. This was then repeated with the female Betta. These two constitute one trial. There was a total of three trials, so both the male and female were in the primary bowl thrice

Crayfish are crustaceans that are a part of the phylum arthropoda. Similar to the lobster, an organism within the same phylum, crayfish breathe via feathered gills. It is the use of these gills that allows oxygen uptake and thus the ability to survive in freshwater environments.

Dentition analysis also supports the theory of prey selection by examining teeth form and function. Examination of G. vogtlensis teeth reveals their robust size, large roots, and sharp cutting edges were capable of consuming large vertebrates and invertebrates alike. Carnassial-like morphology of four posterior teeth with large wear facets, implies prey were often too large to be swallowed and had to be processed into smaller pieces (Hulbert et al., 1996).

Materials: Scale, potato slice, big tub, small cup, petri dish, big tub lid, mealworms, tape, BTB, and a pencil.

Pacific sleeper sharks, which are also known scavengers, can glide through the water with little body movement and little hydrodynamic noise making them successful predators. They feed by suction and cutting of their prey. They have large mouths that can inhale prey and their teeth cut up any pieces that are too large to swallow. They show a characteristic rolling motion of the head when feeding. Only in Alaska has the shark's diet been studied - most sharks' stomachs contain remains of giant Pacific octopus. They are also known to feed on bottom-dwelling teleost fishes as well as soles, flounders, Alaska pollock, rockfishes, shrimps, hermit crabs, and even marine snails. Larger Pacific sleeper sharks are also found to feed on fast swimming

Their target prey is usually fish (both bony fish, and sharks and rays). They will also eat crustaceans, sea turtles, cetaceans (such as dolphins), and squid.

A well-known feature of the catfish is the barbels that are present around their mouths. The presence of these barbels reduced the maxilla in catfish so they cannot protrude their mouth like other fish. These barbels are often referred to as barbs and serve as sensory organs because they house the taste buds of the catfish and are used to search for food in dark or swampy water. These barbs may also be called whiskers and it is because of this similarity that they are called catfish. Catfish may have a maximum of four pairs of barbs depending on the species, but they always come in pairs. These barbels, though they may look dangerous, are usually harmless. However, some species of catfish have similar-looking methods of

L. Scobina are Carnivores (an animal that gets food from killing and eating other animals”). They have a physiological adaptation which by using highly evolved chemo-detection, they are able to locate prey/ food over long distance and touch by extending their siphon from the front of their shell to taste the tell- tale chemicals in the water that reveals the presence of food. L. Scobina like to prey on Chamaesipho columna. They force open the protective plates of C.columna with their muscular foot, and insert their proboscis (long, thin nose) into the flesh to consume it. The proboscis is made up of the radula, oesophagus and mouth. A radula is a special structure used by L. Scobina to scrape food off rocks or create depressions in rocks that