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What makes it necessary for animal cells although they have no cell walls to have intercellular junctions?
Intercellular junctions are necessary for animal cells to maintain tissue structure, provide communication between cells, and regulate the passage of molecules. Without cell walls, intercellular junctions are crucial for holding cells together, allowing them to function as a coordinated unit. Additionally, they facilitate the exchange of signals and nutrients between cells.
Why do turbellaria have flat thin bodies?
It increases surface area and allows the animal to exchange gases and lose waste by diffusion.
What is the structure or behavior that allows an animal to perform a basic function in its environment is called a what?
adaptation instinct morphological specialization.
What is an AGJ?
An AGJ is an annular gap junction - a moon-shaped intercellular connection between certain animal cell types.
Which intercellular junction allows for the rapid movement of small molecules or ions to flow from one animal cell to the next?
Gap junctions are the intercellular junctions that facilitate the rapid movement of small molecules or ions between adjacent animal cells. These specialized structures consist of protein channels called connexons that connect the cytoplasm of one cell to that of another, allowing for direct communication and coordination of cellular activities. This connectivity is crucial for processes such as electrical signaling in cardiac and smooth muscle tissues.
Why do four legged animals have a smaller pelvis?
Pelvic size generally correlates with the size of the animal and varies with the structure of the animal and how it uses it's limbs for locomotion. The size, structure and orientation of a bipedal animal's pelvis is allows for vertical attachments of the bones and muscles of the legs...
If an animal has a vestigial structure what can a biologist infer about the animal's evolutionary history?
that the animal once had a use for that structure depending on where it lived. or that it decended from an animal that had that structure and used it.
What does a animal have but an insect don't?
An insect is a type of animal. Any structure on an insect is, by definition, a structure on an animal.
The is marked by the exchange of plant and animal life between the Old and New Worlds?
The Columbian exchange marked the exchange of plant and animal life between the Old and New Worlds.
How do the structures and functions of cell surfaces and intercellular junctions of plant and animal cells compare?
This is a homework assignment not a simple question. WikiAnswers will not do your homework for you. However while researching your homework, if you have specific bits that you do not understand and ask us questions about these, we will be happy to answer your questions.
Can any animal breathe while it is in it's egg?
Yes, developing bird embryos can breathe while inside the egg through a specialized structure called the chorioallantoic membrane, which helps exchange oxygen and carbon dioxide with the environment. This membrane also allows for the expulsion of waste products.
What is the largest structure in the animal structure?
The nucleus
