In humans, the placenta is essential to the embryo for RESPIRATION, NUTRITION AND EXCRETION.
The placenta refers to an organ in the uterus of pregnant mammals that is responsible for nourishing and maintaining the unborn baby through the umbilical cord. Th placenta has many functions but primarily it plays critical roles in the nutrition, respiration and excretion of the fetus. Its other functions include: production of hormones, production of immunity for the fetus for prevention from infections, etc. <span />
Answer:
The best term that portrays the highlights of an american robin with its nearby family members is autapomorphy.
An autapomorphy is a particular component that is remarkable to a given taxon. In the given case, this component is block red gut and dark back. This component is seen in just the american robin species and not related species in the family.
Apomorphy is characterizes as a novel trans-formative attribute that is one of a kind to a specific animal categories and every one of its relatives and which can be utilized as a characterizing character for an animal groups or gathering in phylogenetic terms. For instance ownership of quills is an element one of a kind to flying creatures and is a characteristic that characterizes all the individuals from the Ave's class.
Synapomorphy is a trademark present in a tribal species and shared solely by its trans-formative relatives.
A plesiomorphy or symplesiomorphy is a tribal character or attribute state shared by at least two taxa.
<span>Tap water is one of the three test conditions of the independent variable, the type of water.</span>
The cellular membrane across which ion flow varies during auditory transduction is the hair cell membrane.
<h3>What is a cellular membrane?</h3>
A cellular membrane separates the interior of all cells from the outside environment.
Lipids of cell membranes include phospholipids composed of glycerol, fatty acids, phosphate, and a hydrophobic organic derivative such as choline or phosphoinositol.
Thus, hair cell membrane is the correct answer.
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<span>The correct answer to the question, 'which of the following scenarios is representative of how agricultural practice can affect the environment' is A. Option A is chosen because it is the only option that refer to another environment which is different from that of the farm. When fertilizers are washed to nearby ponds as a result of erosion, it causes a lot of negative changes in the pond. For instance, the chemicals in the fertilizer can be poisonous to some of the smaller organisms in the pond, this will result in the death of these organisms. Fertilizer run off can also cause excessive growth of plants such as algae in the pond. This may block out the light necessary for the survival of the organisms in the ponds and may also reduce the amount of oxygen available to the organisms living in the pond.</span>
