When scientists transfer a cloned human bcl-2 gene into a c. elegans embryo with a loss-of-function mutation in ced-9, cell death is prevented. what does this tell you about ced-9, bcl-2, and apoptosis in the context of evolution?
select all that apply.
1. c. elegans (nematodes) and humans (mammals) have evolved distinct pathways for apoptosis, although both pathways have the same effect on the cell.2. c. elegans (nematodes) and humans (mammals) share a common pathway for apoptosis.3. the human gene, bcl-2, and the c. elegans gene, ced-9, are evolutionarily related and descended from a common ancestral gene.4. the human gene, bcl-2, and the c. elegans gene, ced-9, are the same gene.

Identify the type of energy used in each action. the flexing of an arm muscle: a signal transduction process by a neuron: a ball at the top of a hill: 1. electrical energy 2. mechanical energy 3. gravitational potential energy

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area

Moving down the ramp from 6 meters to