Answer:
have curved protofilaments at their plus ends
Explanation:
Microtubules are polymers of tubulin proteins that function as the cytoskeleton of eukaryotic cells. Microtubules are dynamic structures that can grow and shrink at a rapid rate. During this process, tubulin subunits can associate and dissociate at the plus end of the protofilament. Tubulin subunits bind to two GTP molecules, one of which is hydrolyzed to GDP after assembly. When microtubules are unstable, protofilaments curl outwards because GDP-bound tubulin has a weak affinity (thereby curving it) and disassemble. The dynamic stability of microtubules is regulated by a feedback loop: when microtubules shrink, free tubulin concentration increases and microtubules start to grow. As microtubules grow, free tubulin concentration decreases and the rate of GTP-tubulin addition also decreases.
True because when you have a gene it replicates.
Nucleus- contains genetic material (DNA) in the form of chromosomes
Cell membrane - controls what goes in and out of the cell
Mitochondria- where aerobic respiration takes place releasing energy
Cell wall - supports the cell by giving it strength and shape made of cellulose
Golgi body - processes and bundles macromolecules like proteins and lipids as they are synthesized within the cell
er - a continuous membrane system that forms a series of flattened sacs within the cytoplasm of eukaryotic cells and serves multiple functions, being important particularly in the synthesis, folding, modification, and transport of proteins
Ribosome- where proteins are made, protein synthesis
Cytoplasm- contains chlorophyll where photosynthesis occurs
Chloroplast- where chemical reactions occur
Vacuole- gives strength from within and contains sap when filled forming the shape of the cell
lysosomes - membrane-bound cell organelle that contains digestive enzymes
Answer: homologous structures are inherited from a common ancestor.
Explanation:
According to comparative morphology, homologous structures are inherited from a common ancestor. They also show similar pattern in in their embryological development.
Homologous structures are the similar structures due to shared ancestry. The organism with homologous structures are all the descendants of a common ancestor.
