<span>Orphan records are records whose foreign key value does not refer to a primary key value. Orphan records are very common in database relationships. The process used to remove and fix orphan records is called scrubbing the database.</span>
Answer:
In thermodynamics, a closed system can be described as a system which can exchange energy from outside but matter cannot be transferred from such a system. This means that the resources present on the Earth cannot be transferred or replaced and the waste can also not be removed. By understanding the concept of the closed system, humans should recognize the fact that many resources such as minerals present on the Earth cannot be replaced and hence, resources should be utilized effectively in a conserved manner. Also, as waste cannot be removed hence humans should stop forming such waste products which cannot be removed or recycled.
Identify the process by which natural selection acts on Change in Population the surviving insects reproduce. The frequency of resistant insects in the population increases.
- Pesticides are any poisonous substances that are employed to kill animals, fungi, or plants and cause financial loss to crops or ornamental plants or pose a risk to domestic animals' or humans' health.
- A pesticide is used on an insect population. Some insects possess a trait that renders them pesticide resistant. These flies remain. Without the gene, insects perish.
- Insects that are still alive reproduce. Insects that are resistant are becoming more prevalent. Ecological Change Insecticide is used on a population of them.
- Choosing Pressure Some insects have a trait that renders them pesticide resistant. These bugs are persistent. Without the gene, insects perish.
To learn more about Pesticides.
brainly.com/question/24316938
#SPJ4
D. an asteroid because an asteroid is the only thing that can form a meteor crater.
Answer:
E
Explanation:
A chloroplast is the organelles in which photosynthesis takes in plants. The chloroplast has thylakoid lamellae that occasionally arrange itself into stacks called grana where there are photosystem units that have chlorophyll pigment. The chlorophyll pigments tap energy from the photons of sunlight and use it for photophosphorylation.
