Answer:
Which event is an example of a living thing responding to a stimulus?
Phototropism is an example of a living thing responding to a stimulus, plant grows in direction of light which reflects the response to the stimulus produces by light, as light direction changes plant also changes direction.
Explanation:
Answer:
Proteins
Explanation:
Proteins are the main building block of the body. They are required for proper growth of the organism.
I would make a spray that is not harmful to the environment, but instead it kills mosquitoes. If any other animals eats this, they will not die. It is for mosquitoes specificly.
Answer:
Explanation:
Grunion are the two species of genus Leuresthes. that are L. tenuis and L. sardinas. The species are found in the coasts of California. These species reproduce by external fertilization. The tides plays important role in reproduction of these species.
The females come on the sandy shores of the beach where they lay their eggs in the sand during high tides. The males wrap themselves around the females and secrete their sperms. The eggs remains hidden inside the sand for 10 days. With the next set of high tides, the eggs hatch and young grunions move towards the sea.
Answer:
The correct options are:
a) The ability to halt the cell cycle in response to DNA damage.
c) The ability to repair DNA damage.
e) The ability to stimulate cell death processes if the cell is irreparably damaged.
Explanation:
p53 gene has been called 'the guardian of the genome' because its prevents genome mutations which can bear to tumor formation. The main roles of p53 are:
DNA repair (option c): it activates a ribonucleotide reductase which is involved in DNA repair when it is damaged.
Growth arrest (option a): it avoids the cycle cell progression when a damage occur.
Apoptosis (option e): it induces programmed cell death or apoptosis (because every cell must die eventually).
These processes are involved in prevention of tumor formation through activation/inhibition patways which in last instance prevent the replication of cells with a damaged/mutated genome.
