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Are any organelles present in only plant cells?
Every cell has organelles. Prokaryotes were once thought to have no organelles but some have been found now. Eukaryotes have membrane bound organelles and prokaryotes do not.
How many genes are ona human chromosome?
In recent study it has been found that there are about 20,000 to 25,000 genes in our genome.Most of the sequences in our genome does not code for anything. Junk DNA or introns constitute about 90% of our genome.
Why was the cytoskeleton within the cytoplasm recently discovered?
The cytoskeleton was not recently discovered; it has been studied for decades. Its importance in providing structural support to cells, aiding in cell division, movement, and intracellular transport has been well-documented in scientific literature.
What continents have monotremes fossils been found on?
Almost all monotreme fossils have been found in Australia. An exception is the fossil of a platypus-like creature named Monotrematus sudamericanum found in Argentina, within a Patagonian rock formation.
Are genes made up of chromosomes?
You have that backwards: chromosomes are made up of genes. The above sentence is literally true of the single circular chromosome in Prokaryotes. However in Eukaryotes it is much more complex: chromosomes are made up of genes (which are made up of exons and introns), gene control codes), at least one centromere (only one of which is functional if there is more than one), at least two telomeres (to prevent the two ends of the linear chromosome from unraveling and also believed to reduce the chance of cancers), and many sections of unknown function generally believed to be genetic "junk" that does nothing but occupy space in the chromosome. The term "junk" DNA has now been discovered to be places where genes have been turned off or hidden.
Are hox genes found in bacteria?
Hox genes are a hallmark of multicellular life and are not found in bacteria. Hox genes are just one type of a larger family of gene called "homeobox genes" (watch out, they sound similar!). Bacteria have genes that resemble homeobox genes (Kant et al. 2002) but they're only distantly related to those in multicellular life (Derelle, 2007), and definitely don't have Hox genes. Both plants and animals have homeobox genes, including the subset called Hox genes. The homeobox genes were first found in the fruit fly Drosophila melanogaster and have subsequently been identified in many other species, from insects to reptiles and mammals.Homeobox genes were previously only identified in bilateria but recently cnidaria have also been found to contain homeobox domains and the "missing link" in the evolution between the two has been identified.Homeobox genes have even been found in fungi, for example the unicellular yeasts, and in plants.But no evidence of hox genes are found in bacteria
Most sex-linked genes are found on which chromosome x y?
Many sex-linked genes are found on the X chromosome. More than 100 sex-linked genetic disorders have now been mapped to the X chromosome. The human Y chromosome is much smaller than the X chromosome and appears to contain only few genes.
Are any organelles present in only plant cells?
Every cell has organelles. Prokaryotes were once thought to have no organelles but some have been found now. Eukaryotes have membrane bound organelles and prokaryotes do not.
Has all human genes been identified and named?
Most, but not all human genes have been identified and named.
What is the difference between homologs and orthologs in terms of evolutionary relationships between genes?
Homologs are genes that share a common ancestry, while orthologs are homologous genes that are found in different species due to speciation events. In other words, homologs are genes that are related through evolution, while orthologs are homologs that have been separated by the divergence of species.
What are grinding stones made of?
They are found within the environment and picked up to be used.
Is a mitochondria in a plant cell animal cell or both?
-Mitochondria are organelles within eukaryotic cells -Mitochondria themselves are not cells, but are believed to have once been a cell themselves because they have a double membrane and their own genetic material...DNA -Plant and animal cells are eukaryotic
How many genes does a cat have?
Cats have approximately 20,000 to 25,000 genes, similar to the number found in humans. The feline genome has been sequenced, providing insights into their genetics and health. This genetic information helps researchers understand traits and diseases specific to cats.
How many genes are ona human chromosome?
In recent study it has been found that there are about 20,000 to 25,000 genes in our genome.Most of the sequences in our genome does not code for anything. Junk DNA or introns constitute about 90% of our genome.
Why has Excedrin been removed from store shelves?
There has been a few lots of the drug Excedrin that were found to have fragments of tablets of other drugs within the bottle. Exact details of what was found I don't believe was released.
Why was the cytoskeleton within the cytoplasm recently discovered?
The cytoskeleton was not recently discovered; it has been studied for decades. Its importance in providing structural support to cells, aiding in cell division, movement, and intracellular transport has been well-documented in scientific literature.
What are the cell organelles that present only in eukaryotic cell?
The organelles found only in eukaryotic cells includes endoplasmic retculum, mitochondria, chloroplast, Golgi complex, lysosomes, endosomes, peroxisomes and glyoxisomes, and a distnct nucleus.
