#Question id: 28420
#Unit 5. Developmental Biology
Which of the following cell is involved to shedding of most of the deep cells during chick development?
#Question id: 12252
#Unit 10. Ecological Principles
In a study of interactions between plants, ants and caterpillars, the following experimental treatments were imposed: i) Control (both ants and caterpillars are present); ii) Ant removal; iii) Caterpillar removal; iv) Ant and caterpillar removal. Plus (+) indicates presence and minus (-) indicates absence on plants. The results for plant performance (growth) from this experiment are shown in the figure below. Plant performance in all treatments were significantly different from each other. Based on these results, which of the following inferences is correct?
#Question id: 7049
#Unit 5. Developmental Biology
Invaginating cells during amphibian gastrulation, in which the main body of each cell is displaced toward the inside of the embryo while maintaining contact with the outside surface by way of a slender neck-
#Question id: 13219
#Unit 6. System Physiology – Plant
#Question id: 613
#Unit 1. Molecules and their Interaction Relevant to Biology
Ethanol (CH3CH2OH) is the alcohol found in beverages. It is oxidized in the body to acetaldehyde by the enzyme alcohol dehydrogenase. Methanol (CH3OH), also known as wood alcohol, is converted to formaldehyde by the same enzyme. Acetaldehyde is toxic, but formaldehyde is far more toxic to humans, which is why the ingestion of relatively small amounts of methanol can cause blindness or death. One treatment for mild methanol poisoning is the administration of ethanol. Why might a doctor choose this treatment?