Answer:
Stem cells have the ability to change into other types of cells.
Explanation:
Is there more information?
The meanings of these two terms are different because biotic factors are factors which are actually living (ie predators), and abiotic factors are nonliving (ie humidity, temperature)
<h2>Cdk-cyclin</h2>
Explanation:
Timing and all events of cell cycle is tightly regulated by a heterodimeric protein complex called Cdk-cyclin
Cyclin is the regulatory subunit which is bound to Cdk and activate them whereas Cdk is the catalytic subunit, cyclin bound Cdk becomes active and act as serine threonine kinase and phosphorylate target proteins
Cyclin-D-Cdk 4/6 is required for cell to enter in cell cycle, Cyclin-E-Cdk 2 is required for a cell to enter into S phase from G1, Cyclin-A-Cdk 2 is required for proper DNA replication and centrosome duplication and also induce disassembly of pre-replication complex and Cyclin-B-Cdk 1 is required for duplication of cell organelle and condensation of chromosomes
Therefore four correct statements are:
1. Mitotic Cdk-cyclin catalyzes the phosphorylation of condensins and lamins
2. Phosphorylation of condensins and lamins contributes to chromosome condensation and nuclear envelope breakdown
3. It is possible to trigger chromosome condensation and nuclear envelope breakdown prematurely by experimentally introducing mitotic Cdk-cyclin into cells that have just emerged from S phase
4. Mitotic Cdk-cyclin is normally activated at the end of G2
The answer is sponges.
Animals with the radial symmetry of the body have<span> body parts that seem to extend from a central point, just like spokes in a bicycle wheel.
Through the process of elimination:
Sponges have radial symmetry.
Flatworms have bilateral symmetry.
Crayfish have bilateral symmetry.
Therefore, among all choices, only sponges have </span>body parts that seem to extend from a central point, just like spokes in a bicycle wheel. <span>
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