Answer:
Gap junctions
Explanation:
They allow adjacent cells to communicate. These channels form a close connection between cytoplasm because small molecules such as ions are able to pass through from cell to cell. Examples of cells with gap junctions are cells in heart muscle tissues. Gap junctions are found in animal cells and are akin to plasmodesmata in plant.
Answer:Lobsters, like insects, belong to the invertebrate phylum Arthropoda. Besides lobsters and insects, spiders and snails belong to this group as well. These animals are closely related because of two main characteristics that they share: they all have an exoskeleton (outer skeleton) and they all have joint appendages
Explanation:
Answer:
b. muscle
Explanation:
The Sponges usually known as Porifera (pore bearers) are aquatic filter feeders. The sponges consist of structural materials (spongin, spicules) which are usually made of calcium carbonate and/or silica. These structures forms their skeletal materials giving their body a thin sheet of cells over a frame (skeleton). As invetebrate and at the unicellular level of organization, Sponges lack muscle.
Answer:
D. it takes millions of years to form
The synovial joints are the joints found in the human body that allow movement of the body parts. These joints have cavity that are filled with synovial fluid. There are six different types of synovial joints.
The first carpometalcarpal joints are example of saddle joints. The carpometacarpal joint is formed between carpal bone and first metacarpal bone of the thumb.