Hurricane Katrina was a density-dependent factor because this disaster affected everyone in the area. It did not selectively have an effect like
Answer:
D
Explanation:
A plant needs to use the energy from the sun to make glucose and other nutrients it needs. Air is needed for glycolysis and photosynthesis to occur. Water is needed by all living things to stay alive.
A lipid containing a phosphate group in it's molecule.
Answer:
a transgenic copy of the gene C is sufficient to restore normal eye development
Explanation:
In genetics, there are diverse approaches to determining a gene's function. For example, it is possible to use a complementation test to determine loss-of-function recessive mutations when it is unknown if such mutations fall in the same or in different genes. Similarly to the generation of loss-of-function phenotypes, it is possible to insert a gene and thus produce a gain-of-function mutation that restores normal gene function (i.e., to restore the wild phenotype). Moreover, transgenic organisms refer to genetic engineering techniques by which any foreign or modified gene is inserted in the genome of an organism, which can also be used to study gene function. In this case, the restoration of the normal phenotype (wild-type eyes) is associated with the expression of the transgenic gene C, thereby evidencing that the gene C is required for normal eye development. In the last years, transgenic models have shed light on developmental pathways and on gene function.