Answer:
a. DNA replication proceeds in a 5' to 3' direction in the new DNA molecule and in the opposite direction in the original
c. Each new DNA molecule contains an original strand and a newly synthesized strand.
Explanation:
DNA replication is an important process every cell must undergo prior to division. DNA replication is the process whereby DNA content is doubled. It occurs as a result of an enzyme called DNA polymerase, which synthesizes nucleotides.
DNA replication follows the semi-conservative model which uses one original DNA strand to synthesize a new DNA strand. The double-stranded DNA is separated into two single strands which serve as template for new strands. Due to the action of DNA polymerase, DNA replication proceeds in a 5' to 3' direction in the new DNA molecule and in the opposite direction in the original.
Also, each newly synthesized DNA molecule which is similar to one another contains an original strand (template) and a newly synthesized strand.
Negative selection (D) removes the harmful alleles.
As population size approaches the carrying capacity of the environment, the intensity of density-dependent factors increases. For example, competition for resources, predation, and rates of infection increase with population density and can eventually limit population size
Answer:
Some of the environmental issues that are related to agriculture are climate change, deforestation, dead zones, genetic engineering, irrigation problems, pollutants, soil degradation, and waste.
Explanation:
<h2>Wet versus Dry habitats</h2>
Explanation:
- Plants from wet habitats have a relatively large number of stomata and thin cuticle
- Plants from dry habitats have a less number of stomata and thick cuticle
- Stomata helps in exchange of gases whereas cuticle reduces the loss of water
- If water is more then plants have large number of stomata which helps in great access to water and increases support for herbaceous tissues
- In case of dry habitat conditions are not favorable with regard to water hence a thick cuticle is required to minimize the water loss while in wet habitat water is abundant hence they have a thin cuticle
A.Vascular plants have a relatively large number of stomata
B. Plants from wet habitats include white lotus,water lily
C. Plants from dry habitats include xerophytes for example cactus,oleander
