Abiology class is conducting an experiment to determine how soil ph may affect the germination of pine seedlings. three pine seeds are placed in a pot of soil with a ph of 6.5, and three pine seeds are placed in a pot of soil with a ph of 4.0. after one week, the students count the number of seeds which have germinated and determine the mass of each pine sprout. which of these is the best way to improve the accuracy and validity of the data in this experiment? a) repeat the experiment with other types of seeds b) repeat the experiment using soils of different ph c) increase the sample size by using additional pots and seeds d) increase the number of independent variables in the experiment

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

events in order:

1.       vishnu schist

2. zoroaster granite

3. bass limestone

4. hakatar   shale

5. igneous intrusion

6. shinumo quartzite

7. dox sandstone

8. tapeats limestone

9. bright angel shale

10. muav limestone

11. temple butte limestone

12. redwall limestone  

nonconformity

answer: the unkar group shows angular unconformity because the layers are turned at angle.

unconformity

answer: specifically the angular unconformity occurs between the cambrian and precambrian rocks. the dox sandstone, shinumo quartzite, hakatar shale, and bass limestone have been filled. an angular unconformity occurs between the cambrian and precambrian rocks. the dox sandstone, shinumo quartzite, hakatar shale, and bass limestone have been filled.

disconformity

answer: the disconformities aremarked irregular lines between the sedimentaryrocks layers.