1. Each duckling came from these parents. They look similar, but they are not exactly the same. Why are they not identical? Explain. 2. Identify and describe something that has a particular structure.
3. Your facial features are visible cues to others. They help you express, or show, your emotions. How does this relate to the way genes are expressed?
4. What would happen to offspring if crossing over did not occur?

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )

its probably to later but whats the question