The placenta is the site where antibodies in the mother's blood pass into the fetal circulation. these antibodies give passive immunity to the fetus for several common childhood diseases. there are some infections for which the mother does not provide antibodies to the fetus. what infection is the fetus not protected from?

In the presence of oxygen, glycolysis is followed a. the krebs cycle b. lactic acid fermentation c. alcoholic fermentation d. photosynthesis

Select the correct answer.what is the observable characteristic of a person called? o a. genotypephenotypeoc.alleleo d.gene

1. in what ways have non-native species been beneficial? 2. what are some of the hypotheses for the collapse of honeybee colonies? 3. distinguish between regional and functional extinction. 4. why is it difficult to measure background extinction rates? 5. what three factors are most important in causing extinction rates to climb?