*They formed before other types of plates.
*They are heavier than continental plates.
*They move more often than continental plates.
Answer:
Option (3)
Explanation:
Earth's crust is divided into two types, namely the oceanic crust (plate) and the continental crust (plate). These plates move over the layer of the asthenosphere due to the convection current that generates in the mantle.
These oceanic plates are denser (heavier) than the continental plates because oceanic plates are comprised mainly of denser basaltic rocks that are rich in plagioclase feldspar and pyroxenes. When magma comes out at the mid-oceanic ridge on the ocean floor it forms lava.
Whereas continental plates are made up of silicate rocks, granitic rocks, and some feldspars and are less denser in comparison to the oceanic rocks.
Thus, the correct answer is option (3).
Explanation:
oceanic plates are heavier then other plates
The purpose of ethical guidelines for handling of experimental subjects is to ensure the safety and well-being of all living creatures in an experiment.
Ethical guidelines include issues such as human rights, animal welfare, safety compliance with the law, conflicts of interest, health standards..
Ethical guidelines are the norms for the acceptable and unacceptable behaviors of the researchers.
Answer: To ensure the safety and well-being of all living creatures in an experiment
Explanation:
True. N.L Bowen hypothesized that minerals formed in two different ways. The first is a gradual, continuous fashion with minerals that have very similar chemical components. The second is through a sudden, discontinuous change in the mineral type.
It is a bacterioptrage.
It undergoes a lysogenic cycle.
H.
It does not contain a viral envelope.
J.
It does not kill host cells after infection.
Answer:
The correct option is : It undergoes a lysogenic cycle.
Explanation:
A virus can replicate inside a host cell by two process :
In the lytic cycle, the viral DNA makes copies of itself and manufactures the viral machinery inside the host cell. Eventually, the host cell bursts causing the release of the viruses. In such a condition the varicella virus would cause chicken pox.
In the lysogenic cycle, the DNA of a virus get incorporated into the DNA of the host. The viral DNA might replicate when conditions become favourable and cause diseases. In such a condition, the varicella virus would cause shingles.
Mechanical weathering physically breaks down rocks without changing their composition, while chemical weathering alters the chemical composition. Both types of weathering are influenced by climate and contribute to the erosion of rocks.
Mechanical weathering is the physical breakdown of rocks into smaller pieces without changing the composition of the rock, while chemical weathering is the process that alters the chemical composition of rocks, causing them to break down. Mechanical weathering can occur through processes like frost wedging, abrasion, and exfoliation, whereas chemical weathering can occur through processes like oxidation, hydration, and carbonation.
Despite their differences, there are some similarities between mechanical and chemical weathering. Both processes can be influenced by climate and environmental conditions, such as temperature and rainfall. Additionally, both types of weathering contribute to the overall breakdown and erosion of rocks, ultimately shaping the Earth's surface.
Learn more about Mechanical and Chemical Weathering here:
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