Answer:
The lactose present prevents the production of lactase
Explanation:
This question is describing a set of genes in bacteria called LAC OPERON. Lac operon controls the production of lactase, which is the enzyme that digests lactose. However, this gene can be regulated at the transcription level i.e caused to be transcribed or not depending on certain factors.
According to the question, lac operon, which regulates the production of enzymes will be transcribed and subsequently translated i.e. turned on when there is a substrate (lactose) that the produced enzyme will work on. However, when there is no need of the lactase enzyme or there is absence of lactose (substrate), the lac operon gene is turned off.
Note that, the statement that "The presence of lactose prevents the production of lactase" is not correct.
Answer:
eukaryotic
Explanation:
Fungi (or Mushrooms) are eukaryotic and have a complex cellular organization.
Algae are eukaryotic cells, or cells that contain a nucleus, which makes them slightly more complex than bacteria
Protozoa are single-celled eukaryotic (organisms whose cells have nuclei) that commonly show characteristics usually associated with animals, most notably mobility and heterotrophy.
The causes of monocultures are the economics of
global product of agriculture, standard of industrial society, and the apparent
“simplicity” of managing only one crop.
The major cause of the loss of top soil is
soil erosion (which is caused by the factors like water, wind and tillage of
farm fields). Loss of top soil become a global problem for agriculture.
<span>A species that are occurring outside of its
normal distribution are known as Alien species. The cause of alien species is
that these species are not native to ecosystem and they can cause harm to the
environment.</span>
A mutation is a change in a gene
Answer:
Box one: A compound
Box two: bonded chemically
Explanation:
it's a molecule, which is a collection of atoms bonded together chemically through their electrons.
hope that helps!
