Answer:
Lizards / Reptiles
(Scientific four-legged snake is: Tetrapodophis)
Explanation:
couldn't add answer ^^ ignore comment :-)
Answer:
A karyotype is the individuals collection of chromosomes
you can use the individuals karyotype to determine if a fetus has down syndrome by looking at chromosome 21. If the fetus has an extra copy of chromosome 21, it will have down syndrome.
Explanation:
hopefully this can help you! :)
Answer:
Land vertebrates developed lungs, a new vein (the pulmonary vein) to take blood from them to the heart, and a double circulation, whereby the heart is effectively divided into two halves—one-half concerned with pumping incoming deoxygenated blood from the body to the lungs and the other with pumping oxygenated blood .
Explanation:
Answer:
this is an extremely broad question. they do it through a problem, hypothesis, experiment, analysis, then conclusion.
