Located on the basilar membrane are(is) the <u>organ of Corti</u><u> </u>containing hair cell sensory receptors for the sense of hearing.
The organ of Corti is also called basilar papilla which is a complex form of neuroepithelium composed of hair cells sensory receptors and supporting cells. In addition to these sensory and supporting cells, the organ of Corti also consists of a tectorial membrane. Endolymph which is a potassium-rich fluid surrounds the organ of Corti. The organs known as scala tympani and scala vestibule are present under and above the basilar papilla respectively.
The function of the organ of Corti is to generate electrical signals based on the sounds and transmit these signals to the brainstem through the passage of auditory nerves.
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Answer:
a. True
Explanation:
Coevolution is a biological process where pairs of species or among groups of species reciprocally affect each other's evolution through natural selection. This process produces genetic changes in the traits of interacting species that are a consequence of reciprocal adaptation between these interacting taxa. Coevolution occurs when species are ecologically intimate (i.e., they interact with one another), such as the interaction between hosts and parasites or predators and prey.
Answer:
a.The phenotypic proportions obtained after having the genotypes are 50% marbled seeds, 25% spotted and dotted seeds since they are codominant, 25% spotted seeds.
b. Taking into account the F1 genotypes in the previous point, the expected phenotypes for the first crossing are 100% marbled seeds and for the second crossing 100% dotted seeds.
Explanation:
Let's suppose:
Marbled allele: M
Spotted allele: S
Dotted allele: D
Allele for Clear: C
a. Because both crosses were between homozygous parents, the entire F1 genotype is the same.
For the first crossing the descendants have the MS genotype, and for the second crossing the descendants have the DC genotype. It is enough to make a Punnett square to obtain the different combinations of genotypes between the crossing of MS and DC.
The 2% of the insects will begin to reproduce and grow their population exponentially and in time enable the population to recover. This is if the population is large enough to enable random mating. The 98% reduction in population drastically reduces competition for the remaining individuals hence giving them abundant resources for them to thrive.
