Adaptation and reproduction isolation
Answer:
The order must be K2→K1, since the permanently active K1 allele (K1a) is able to propagate the signal onward even when its upstream activator K2 is inactive (K2i). The reverse order would have resulted in a failure to signal (K1a→K2i), since the permanently active K1a kinase would be attempting to activate a dead K2i kinase.
Explanation:
- You characterize a double mutant cell that contains K2 with type I mutation and K1 with type II
mutation.
- You observe that the response is seen even when no extracellular signal is provided.
- In the normal pathway, i f K1 activat es K2, we expect t his combinat ion of two m utants to show no response with or without ext racell ular signal. This is because no matt er how active K1 i s, it would be unable to act ivate a mutant K2 that i s an activit y defi cient. If we reverse the order, K2 activating K1, the above observati on is valid. Therefore, in the normal signaling pathway, K2 activates K1.
D. neurotransmitter blocking; neurotransmitter enhancement
Answer:
It's gross to say, but it's true!!
Explanation:
Head lice can survive on a human host for approximately 30 days. Head lice generally cannot survive longer than 24 hours off the host. A female louse lays up to 3-5 eggs per day. It takes 7-10 days for the eggs to hatch and another 7-10 days for the louse to mature and lay their own eggs.
Hope this helps!! ;)
The first question is horses having long legs so they can run away from predators
The second question is Animals are less likely to eat this plant.
The third question is White skin is a favorable adaptation because it makes the lizards hard to see against the white sand.
The fourth question is Organisms produce fewer offspring if the environment does not have enough resources.
The fifth question is People kill rattlesnakes that rattle when approached by humans, but people do not kill rattlesnakes that remain silent. The quiet snakes survive and breed.
The sixth question is With the smallest population size
If this helps brainliest answer would be appreciated
