2.3 Study the table below and answer the questions that follow. A scientist designed an experiment to investigate the water-holding capacity of sand loam and clay soil. A soil sample of each soil type was placed in funnels lined with filter paper. 100 cm3 of water was added to all three soil samples at exactly the same time. The filtrates were collected in measuring cylinders. The result are shown in the following table.

Time (in minutes)

5

8

10

14

18

20

40

60

Volume of filtrate

(in cm3)

Loam

5

10

20

35

45

55

60

65

Sand

10

20

35

50

65

75

75

75

Formulate hypothesis for this investigation.

The independent variable

The dependent variable

ONE fixed variable

Clay

5

10

12

14

16

2.3.1

2.3.2 Identify:

(0)

(ii)

(ii)

Which type of soil will be most suitable for gardening?

(2)

(1)

(1)

(1)

(1)

(3)

(6)

(15)

2.3.3

2.3.4 Give THREE reasons for your answer in QUESTION 2.3.3

2.3.5

Draw a line graph to show the water holding capacity of loam soil.

Hurry 25pts which one of these is involved in both sexual and asexual reproduction a sperm b spores c seeds d eggs

The diagram shows a fossil of an ancient whale skull and a skull of a present-day whale. the ancient whale is extinct and is believed to be an ancestor of the present-day whale. what do these skulls most likely show that supports darwin’s theory of evolution? all populations can adapt and survive. only some organisms have a common ancestor. populations change slowly over time. populations rapidly become extinct.

Chapter 11.1 & 11.2 notes section 11.1 1. every living thing has a set of ? inherited from its parents. 2. after becoming a ? , mendel spent several years studying ? and mathematics at the university of vienna. 3. during sexual reproduction, male and female reproductive cells join, a process known as ? . 4. pea flowers are normally ? , which means that sperm cells in pollen fertilize the egg cells in the ? flowers. 5. when mendel crossed plants with ? characters for the same trait, the resulting offspring had only one of the characters. 6. a ? is a specific characteristic, such as seed color or plant height, that varies from one individual to another. 7. filius and filia are the latin words for ? and ? . 8. the offspring of crosses between parents with different traits are called ? . 9.to mendel's surprise, all of the offspring had the character of only ? of the parents. 10. mendel's first conclusion was that biological inheritance is determined by ? that are ? from one generation to the next. 11. scientist calls the chemical factors that determine traits ? . 12. mendel's second conclusion is the ? . 13. the principle of dominance states that some alleles are ? and others are ? . 14. when mendel allowed the f1 plants to reproduce by self-pollination the traits controlled by ? alleles reappeared in about ? of the f2 plants in each cross.