Answer:
too few workers to support an aging population
Explanation:
According to nature, the cells reach a phase where most of the resources are exhausted in the body and aging kicks in. An increase in aging population would adversely affect the trend of population growth since most of these people are not able to work, look after themselves and therefore would require workers to look after them. When there are few worker to support the aging population, the population is affected because some of them die due to starvation and emerging diseases.
Breathing is the process of moving air out and in the lungs and Respiration is the movement of oxygen from the outside environment to the cells within tissues, and the removal of carbon dioxide in the opposite direction.
Answer:
The dominant curled wing allele is also a recessive lethal.
Explanation:
If we look at the F2 ratio we see that :
curled wings: straight wings= 160:80
=2:1
Hence, if curled wings is considered to be a dominant trait then Curled wings * straight wings
Dd x dd
Punnet square will be as follows :
d d
D | Dd | Dd
d | Dd | dd
Hence in order to get F2
Dd x dd
Punnet square will be the same as above if the F1 cross is Dd* Dd
D d
D DD Dd
d Dd dd
if DD is lethal then the ratio is
Dd:dd=2:1
that is curled wings: straight wings=2:1
Hence, The dominant curled wing allele is also a recessive lethal.
Here’s your answer hope it helps
