meTED EDUCATION А BC What's More Activity 1: "Homogenous or Heterogeneous?” Directions: Identify the following mixtures as homogenous of heterogeneous. Write HM for homogenous mixture and HT for heterogeneous mixture. HT 1. palay and pebbles HM 2. basket balls and soccer balls 3. corn hair and black human hair 4. stone and clay soil 5. petals and leaves 6. pepper and flour 7. monggo seeds and sitaw seeds 8. flour and powdered milk 9. thumbtacks and pins 10. rice grains and pebbles Activity 2: "Solid Materials and Iodized Salt to form

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Two male mice, which we will call male a and male b, are both phenotypically normal. male a was from a litter that contained half phenotypically normal mice and half dwarf mice. the mother of male a was known to be homozygous for the normal igf2 allele. male b was from a litter of eight mice that were all phenotypically normal. the parents of male b were a phenotypically normal male and a dwarf female. male a and male b were put into a cage with two female mice that we will call female a and female b. female a is a dwarf and female b is phenotypically normal. the parents of these two females were unknown, although it was known that they were from the same litter. the mice were allowed to mate with each other, and the following data were obtained: female a gave birth to three dwarf babies and four normal babies. female b gave birth to four normal babies and two dwarf babies. which male(s)mated with female a and female b? male a with both females male a with female b, and male b with female a male a with female a, and male b with female b could not be determined male b with both females

When a person is exercising the body needs to deliver increased amounts of oxygen to the muscles which component of blood ensures that the muscles will receive it