Asking a question is usually what the first step is.
Answer:
The correct answer is option a. "lower melting temperature".
Explanation:
Food makers add hydrogen to vegetable oil in order to make them more solid. The melting point of vegetable oils that go trough a partial hydrogenation process do not lower, actually, the melting point increases. Vegetable oils that are partially hydrogenated are partially saturated, which in consequence increases its melting point to the point that they could be solid at room temperature.
Answer: Analogous structures are those that have a similar function but whose origin is different. Homologous structures have the same function and also start from the same origin.
Explanation:
Convergence is the evolutionary phenomenon by which different organisms that are evolutionarily distant tend, under equivalent environmental pressures, to develop analogous characteristics.
Analogous structures are those that have a different evolutionary origin, but fulfil very similar functions. For example, the wings of a bird, the wings of a bat and the wings of an insect all are for the same thing (flight) but their phylogenetic origin is not the same. This means, they fulfill <u>similar functions by similar means, without having the same evolutionary origin.</u>
The development of homologous structures occurs through divergent evolution, where two related species change a common ancestral structure during their evolution in order to survive by performing different functions.
Then, if they have the same evolutionary origin, they are homologous. <u>So, if two structures have the same function by similar means and also start from the same origin, they are homologous structures.
</u> For example, the extremities of vertebrates, similar skeletal structure, but for different uses.
Answer:
Explanation:
Sperm Mitochondria Are Required for Functional Purposes. Mitochondria host critical metabolic pathways. They regulate the levels of important intracellular second messengers, such as calcium and reactive oxygen species, and they are also involved in the control of apoptosis (Kroemer et al., 1997).
TeethTo cut, tear and grind food.EpiglottisTo block food and water from entering the pharynx.LiverTo filter toxins from blood and it makes bile.GallbladderTo store and release bile into the small intestine.Large Intestine (Colon)To absorb water and then to pass useless waste from the body.Salivary GlandsTo produce saliva which breaks down carbohydrates (starch)TongueTo push food to the back of the mouth prior to swallowing.EsophagusTo force food from the throat into the stomach.StomachTo chemically and mechanically digest food and to turn food into chyme so the body can digest it.PancreasTo produce digestive juices that are released into the small intestine.Small IntestineTo absorb nutrients and help to digest food.RectumTo keep the intestine sealed shut until the need to pass feces arises.