I would say it is answer c.
- In gymnosperms (plants with “naked seeds”—such as conifers, cycads, and ginkgo), the ovules are not enclosed in an ovary but lie exposed on leaflike structures, the megasporophylls.
Answer: The fight-or-flight response is most clearly associated with the release of epinephrine into the bloodstream.
Any physiological reaction occurring due to something which frightens physically or mentally is fight-or-flight response. In order to produce the fight-or-flight response the hypothalamus activation of the adrenal cortical system and sympathetic nervous system takes place. On receiving the signal from hypothalamus the sympathetic nervous system makes the actions of body speed up or gets tensed and body is in an alert condition.
The impulses are sent by the sympathetic nervous system to the smooth muscles and also glands. As a response to it epinephrine or adrenaline and the norepinephrine or noradrenaline is released by the adrenal medulla in the bloodstream. These stress hormones thus bring about changes in the body such as increase in blood pressure and heart rate.
Answer: Las células son las unidades de construcción más básicas de la vida. Todos los seres vivos están compuestos por células.
Explanation:
I believe everyone has a "safest" way of stretching. It depends on your limitations, strength, what you are stretching for, how much time you have, and what you want to stretch. For example, some people believe yoga is a great way to stretch your body, however, many working class citizens do not have the time or money to join a class. If you are sitting all day, get up every 30 minutes to stretch your legs and back, while releasing the stress on your behind from all of the cushioned pressure. Twist your back by swaying to one side or the other on your body. Crack your knuckles if you can. Touch your toes, inching further down each time. Practice makes perfect so the more you stretch, the more your body will be prepared.
Answer: Because apples mature more quickly than hawthorn fruit.
Explanation:
Sympatric speciation can be defined as the formation(evolution) of new species from the previously surviving ancestral species while both continue to inhabit at the same place. This is because the one of the two organism there got better resources than other.
Here, the reason the maggot fly has been contributed to the incipient speciation because apple matures more quickly as compared to that of the hawthorn fruit.
The flies feeding on apple have been selected for the rapid development.
