Answer:
A. Gas is added to the bladder as the fish's depth increases.
Explanation:
The swim bladder is a gas-filled organ localized in the dorsal region of Osteichthyes (bony fish) that allows them to regulate buoyancy, thus maintaining water depth without swimming. Since the swim bladder localizes in the dorsal region, it also functions as a stabilizing organ. This organ is composed of two sacs whose walls contract and expand in response to water pressure. The swim bladder contains an oval window that enables to adjust buoyancy in order to maintain a constant depth, or to ascend or descend in a wide range of water depths.
Answer:
Blood clotting normally occurs when there is damage to a blood vessel.
Explanation:
Platelets immediately begin to adhere to the cut edges of the vessel and release chemicals to attract even more platelets. A platelet plug is formed, and the external bleeding stops.
Next, small molecules, called clotting factors, cause strands of blood-borne materials, called fibrin, to stick together and seal the inside of the wound. Eventually, the cut blood vessel heals and the blood clot dissolves after a few days.
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Segregation of alleles happens when the pair of alleles of each parent separate and only one allele passes from each parent on to an offspring. So if you had heterozygous tall plants and mated them (Tt x Tt), they would each separate into T and t, allowing each offspring to get either a T or a t from each parent. The possible genotypes would be TT, Tt and tt.
The question is incomplete as it does not have the options which are:
A. carbohydrate molecules
B. hydrophilic molecules
C. amphipathic molecules
D. hydrophobic molecules
Answer:
C. amphipathic molecules
Explanation:
Amphipathic molecules are the molecule which posses molecular arrangement in a way that they possess both the water-loving species and water-repelling species.
The amphipathic molecule is best for the formation of cell membranes like the lipid molecules which is comprised of both hydrophobic tail and a hydrophilic head.
Since the evidence shows that the first cell was formed in the aqueous bodies especially in the oceans by the aggregation of a molecule, therefore, the molecules for membrane must be arranged in a way that it could interact with the surrounding environment as well as protect from the environment and the result was the amphipathic molecules.
Thus, amphipathic molecules is correct.
Answer: They are called autotrophs.
