Because so much of the food now a days is very unhealthy and lacks the fiber it should contain.<span />
Different types of fish live for different amount of times. For example, Bettas live up to two years, Loaches live u to 10 years, and Goldfish live for a few or many decades. Most of the average fish don't live up as long as they could.
My source: Goggle.com.
I truly hope this helped!
Answer:
Once the embryo sac has developed, pollination has occurred, and the pollen tube has grown into the ovary to make contact with the ovule, fertilization (fusion of egg and sperm) can occur.Typically, the pollen tube reaches the embryo sac via the micropyle (Greek, mikros + pyle = small opening), or opening, in the integuments of the ovule.. There, it discharges its sperm into the embry
Explanation:
The pollen tube enters into the ovule, through the micropyle. Inside the embryo sac, the tip of the pollen tube ruptures and the 2 male gametes are set free near the egg apparatus. Inside the embryo sac, one of the 2 male gametes fuses with the egg nucleus and forms a diploid zygote. This process is called syngamy or true fertilisation.
<span>The appropriate response is gene isolation. The absence of interbreeding or minimal hereditary blending between living beings of similar species. Supplement. Hereditary confinement might be the consequence of geographic disengagement or of other segregation systems that anticipated effective generation.</span>
