Answer:
in angiosoerms has closed seeds and gymnosperms has opennseeds
Answer:
Opponent-process theory
Explanation:
The opponent- process theory is based on the idea that every time you are going to need a higher amount of something in order to get the same sensation since your body is going to have the tendendy to develop kind of a habit.
Let's say for example that you are scared of something like a snake, at the begining, it's going to be so hard to face the fear and dare to touch one, but after doing it the first time the fear is going to reduce little by little and at the end you will touch them feeling no discomfort or disgust.
In Helena's case the opponent-process is working the other way round, since every time in order to get the same cool sensation she will need a higher quantity of the thing that is making her have those nice sensations, in this case, cocaine.
It’s the most destructive problem in a society. but i am not sure
Answer:
In the case of HIV-1, this loss-of-function mutation has proven to be beneficial.
Explanation:
Loss-of-function mutations are those that result in a gene product that has less or no function compared to the unmutated gene. When the allele completely loses function, (null allele), it is called an amorphous mutation. Phenotypes associated with these mutations are usually recessive, except when the organism is haploid, or when the reduced dosage of the normal gene is not sufficient to produce a normal phenotype (this phenomenon is called haploinsufficiency).
As mentioned earlier, this type of mutation results in a defective gene, but the text shown in the above question shows an example of a beneficial loss-of-function mutation because this mutation provides resistance to HIV-1 infection.
