Fertilization by more than one sperm would result in a polyploidy and an inviable zygote. What is the first line of defense against polyspermy?a. species specific recognition of proteins on the outer coat of the egg. b. changes in the membrane potential of the egg prohibiting additional sperm from entering.
c. capacitation in the sperm fertilizing the egg.
d. products released from the egg changing the zona pellucida of the egg and prohibiting additional sperm from entering.

Where is energy trapped inside the organelle chlorophyll

Which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above select the best answer from the choices provided a b c d

Answer ! in your opinion, what are the limiting factors that might affect the growth or diversity of our ecosystem? respond to this question in claim, evidence, reasoning format. 1. make your claim (i are the limiting factors that might affect the growth or diversity of our 2. follow the claim with 3 pieces of evidence. evidence may be taken from the reading, the videos, previous lessons, or googled answers. site sources, too. 3. use reasoning to explain why you chose your evidence.