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I was practicing with an old DAT test and dont agree with 2 of the answer choices. So I am posting them to see what others might think and why.
The fetal and maternal blood normally are
1. mixed in the allantois
2. mixed in the maternal placenta
3. mixed in the amnion
4. mixed in the fetal part of the placents
5. never mixed
In an ecosystem
1. the energy captured by producers exceeds that captured by consumers
2. the biomass of consumers is usually greater than the biomass of the producers
3. the primary consumers are usually fungi
4. the third and fourth level consumers directly compete with each other
5. producers commonly feed upon consumers
The fetal and maternal blood normally are
1. mixed in the allantois
2. mixed in the maternal placenta
3. mixed in the amnion
4. mixed in the fetal part of the placents
5. never mixed
In an ecosystem
1. the energy captured by producers exceeds that captured by consumers
2. the biomass of consumers is usually greater than the biomass of the producers
3. the primary consumers are usually fungi
4. the third and fourth level consumers directly compete with each other
5. producers commonly feed upon consumers