Answer:
The purpose of colorful petals is to attract insects
Answer:
The genetic material in the sperm combines with the genetic material in the egg to create a new cell that starts dividing rapidly. You're not actually pregnant until that bundle of new cells, known as the embryo, travels the rest of the way down the fallopian tube and attaches itself to the wall of your uterus.
Explanation:
Answer:
Similarities: both are chemical messengers, both can have (but don't necessarily have) similar structures (made from amino acids), both can be produced by the central nervous system (hypothalamus produces some hormones), certain molecules can act as both hormones and neurotransmitters (example: norepinephrine).
Differences: neurotransmitters are released by neurons across a synaptic gap, have very short distances to travel, and act very quickly on the neighboring cell. Hormones are released by glands and often have to travel longer distances, which means that they are slower-acting. Also, hormones are typically used for regulation (negative feedback) while neurotransmitters are used for stimulation of a neighboring cell.
Explanation:
<span>Please remember that spring tides occur approximately twice a month, when the earth and moon and sun are about co-linear. That is about at full moon and about at new moon.
Neap tides occur at half moons, when the moon is off to the side of the line between earth and sun. I hope this can help</span>
Answer:
Signposts that determine the fate of cells.
Explanation:
Embryos for humans and other animals often look alike at certain developmental stages because they share ancient genes. This expression means that a more advanced organism, like humans, will resemble less advanced species during it's development stages.
