Answer:
Explanation:
Spatial competition occurs when the amount of space available is inadequate to satisfy existing or expected future wants. For example space for transport or agriculture may be at the expense of space for ecosystems
A simple stain is used to show that bacteria is present and what they look like opposed to other matter. a differential stain is used to separate organisms into groups.
Answer: 
Explanation:
The Tropic of Cancer is one of the parallels (imaginary line around the Earth parallel to the equator) located in the northern hemisphere (currently its latitude is 
).
It is called "Cancer" because a long time ago, when the summer solstice occurred in the northern hemisphere (on June 20th or 21st), the Sun was in the constellation Cancer (the crab).
Now, if we were just in the North Pole, Polaris would by exactly over our heads (
over the horizon), but as we go south and find the Tropic of Cancer parallel, Polaris altitude will be approximately at an angle of over the horizon.
Hence, the altitude of Polaris measured by an observer at the Tropic of Cancer is .
The Arabian Peninsula known as Arabia is a peninsula located in Western Asia in the northeast of Africa on the Arabian plate. It is on the junction of Africa and Asia. It is east of Ethiopia and northern Somalia, south of Israel and Palestinian. It is known for it's physical features such as the plentiful precipitation, the Red sea, desert terrain, fertile farmland or soil, petroleum reserves and dry climate.
