The options are not complete
Salmon fish hatcheries add a harmless perfume (morpholine) to a stream when they release young fish. When the fish mature, they attract them back to the home stream by using this chemical (in nature the fish smell the unique odors of soil and trees along the home stream). In effect, the hatchery biologist is using
A. the fish's inborn instincts to relocate its own stream.
B. the fish's inborn instincts to relocate its own stream.
C. an experiment based on the ability of fish to learn by trial and error.
D. chemotropisms.
E. Imprinting
Answer:
E. Imprinting
Explanation:
Imprinting is kind of rapid responsive learning occurring at a particular stage in life, whereby the organism establishes a behavioral pattern such as recognition or attraction to it kinship or a substitute.
In the Salmon fish hatcheries(a building where hatching of fish or poultry eggs is artificially controlled for commercial purposes), the addition of a harmless perfume (morpholine) to a stream when they release young fish is a substitute to the Salmon fish kinship. When the fish mature, i.e at a particular stage of their life, they attract them back(a form of attraction to it own kind) to the home stream by using this chemical.
resolvingpower on the microscope?
Answer:
Explanation:
The resolving power of the microscope is dependent upon the objective lens. It can be measured by the ability of the lens to differentiate between the two lines or points on the specimen under observation. The more the resolving power the smaller will be the distance between the two lines or points that can be distinguished.
The following are the two ways that can be used to enhance the resolving power on the microscope:
Using a lens that has a higher aperture.
Decreasing the amount of light being entered into the microscope that means using light of less wavelength.
a. True
b. False
The correct answer is B. False
Explanation:
In development, a growth spurt refers to a period of time in which individuals experience rapid growth or development. In the case of an adolescent growth spurt, this is a natural process that occurs to all individuals including boys and girls during puberty. This takes place because during adolescence the hormone levels change and this leads to rapid growth as well as development or maturation of bones, muscle and the sexual or reproductive system. According to this, it is false an adolescent growth spurt occurs only in boys because this is a natural process that occurs on both girls and boys.
b.thunderstorm that does not produce lightning or thunder.
c.thunderstorm that does not produce hail.
Answer:
greater than 10 mM.
Explanation:
This question deals with the transport of monosaccharide into the everted sacs of the intestine. And in order to be able to solve this question efficiently one must have prerequisite idea on the transport protein for the Sodium ion process of absorption. Also, one must know the structure of the epithelial.
What happens during the experiment is that there will be an absorption of the fructose, the Chloride ion and the Sodium ion and this absorption will lead to the production of osmotic gradient. Therefore,as the osmotic is produced, the fructose will be transported into the sac through diffusion and thus increasing the concentration of fructose.
when homologous chromosomes line up in pairs
when centromeres are separated
when cytokinesis begins
Answer:
When homologous chromosomes line up in pairs.