All of these are evidence of a common evolutionary ancestry for cell signaling except 1. both bacteria and eukaryotic cells have receptors for intercellular signaling in their cell membranes

2.both plant and animal cells participate in cell junctioning

3. both plant and animal cell plastids code for cell membrane receptors

4. both unicellular bacteria and yeast have complex cell-signaling systems that use chemical messengers

Which of these is a major trend in land plant evolution? a) the trend toward smaller size b) the trend toward a gametophyte-dominated life cycle c) the trend toward a sporophyte-dominated life cycle d) the trend toward larger gametophytes

Scenario #2 in 2001, a population of 2,500 poison dart frogs lived in the amazon rain forest. due to increased deforestation, the population dwindled to 25 frogs in 2019. new government regulations were enacted in 2022, successfully putting an end to the deforestation of the amazon rain forest. once deforestation was stopped, the poison dart frog population was able to recover. by 2050, the population reached 8,000 frogs, of that population, 20 are homozygous recessive for being spotted (ss genotype). q2- ? q- p- p2- 2pq-

Which of the following is the source of energy for photosynthesis? a.) glucose b.) chlorophyll c.) carbon dioxide d.) sunlight