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Which statement best describes a critical function of the placenta?
2
immune system
copied and present in the egg cell of the lioness
dynamic equilibrium
Sorting and recombining of genes occurs, which leads to new genetic combinations.
growing cells to develop tissues and then growing these tissues to form an organ
The exchange of oxygen and carbon dioxide occurs between the mother and developing fetus across the placenta.
a feedback mechanism that maintains homeostasis
The system most directly involved in attacking the transplanted kidney is the
2
immune system
copied and present in the egg cell of the lioness
dynamic equilibrium
Sorting and recombining of genes occurs, which leads to new genetic combinations.
growing cells to develop tissues and then growing these tissues to form an organ
The exchange of oxygen and carbon dioxide occurs between the mother and developing fetus across the placenta.
a feedback mechanism that maintains homeostasis
Which numbered column in the chart below contains four terms that correctly identify the most likely types of organisms that could be found at each of the four levels in the pyramid?
2
immune system
copied and present in the egg cell of the lioness
dynamic equilibrium
Sorting and recombining of genes occurs, which leads to new genetic combinations.
growing cells to develop tissues and then growing these tissues to form an organ
The exchange of oxygen and carbon dioxide occurs between the mother and developing fetus across the placenta.
a feedback mechanism that maintains homeostasis
In order for some of the genetic information in the lioness to be present in the cub, the genetic information from the mother must have been
2
immune system
copied and present in the egg cell of the lioness
dynamic equilibrium
Sorting and recombining of genes occurs, which leads to new genetic combinations.
growing cells to develop tissues and then growing these tissues to form an organ
The exchange of oxygen and carbon dioxide occurs between the mother and developing fetus across the placenta.
a feedback mechanism that maintains homeostasis
Tissue engineering is being developed as a technology that would use laboratory-grown tissues to replace diseased or damaged human body parts, such as hearts and kidneys. In order to build these new body parts, scientists would start by
2
immune system
copied and present in the egg cell of the lioness
dynamic equilibrium
Sorting and recombining of genes occurs, which leads to new genetic combinations.
growing cells to develop tissues and then growing these tissues to form an organ
The exchange of oxygen and carbon dioxide occurs between the mother and developing fetus across the placenta.
a feedback mechanism that maintains homeostasis
Which statement about this reproductive cycle is correct?
2
immune system
copied and present in the egg cell of the lioness
dynamic equilibrium
Sorting and recombining of genes occurs, which leads to new genetic combinations.
growing cells to develop tissues and then growing these tissues to form an organ
The exchange of oxygen and carbon dioxide occurs between the mother and developing fetus across the placenta.
a feedback mechanism that maintains homeostasis
Organisms maintain internal stability in a changing environment. To do this, they make a series of adjustments. The process of making these continual adjustments is referred to as
2
immune system
copied and present in the egg cell of the lioness
dynamic equilibrium
Sorting and recombining of genes occurs, which leads to new genetic combinations.
growing cells to develop tissues and then growing these tissues to form an organ
The exchange of oxygen and carbon dioxide occurs between the mother and developing fetus across the placenta.
a feedback mechanism that maintains homeostasis
These events can be best described as an example of
2
immune system
copied and present in the egg cell of the lioness
dynamic equilibrium
Sorting and recombining of genes occurs, which leads to new genetic combinations.
growing cells to develop tissues and then growing these tissues to form an organ
The exchange of oxygen and carbon dioxide occurs between the mother and developing fetus across the placenta.
a feedback mechanism that maintains homeostasis
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