Interpret the block diagram seen here. arranging the letters from oldest to youngest, the order should be

a) a, c, b, d, e, f, h, g

b) a, b, d, e, c, h, f, g

c) a, b, c, d, e, f, g, h

d) g, f, h, c, e, d, b, a

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from

Ascientist is designing an investigation to study the impact of invasive bird populations on local, native bird populations at backyard bird feeders. what population is most likely to be a control group for the investigation? amount of food number of bird feeders invasive bird populations local backyard birdfeeders without food

1. isogamy 1 organisms with gametes of the same size and shape 2. anisogamy organisms with gametes of different sizes and shapes 3. oogamy 2 organisms with gametes of the same shape but different sizes 4. gonads gamete-producing organs in lower plants 5. gametangia gamete-producing organs in animals