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loris [4]
2 years ago
12

How do you change the objective lenses?

Biology
2 answers:
irakobra [83]2 years ago
8 0

Answer:

When focusing on a slide, ALWAYS start with either the 4X or 10X objective. Once you have the object in focus, then switch to the next higher power objective. Re-focus on the image and then switch to the next highest power.

Explanation:

Marta_Voda [28]2 years ago
4 0

Answer:

<em>When focusing on a slide, ALWAYS start with either the 4X or 10X objective. Once you have the object in focus, then switch to the next higher power objective. Re-focus on the image and then switch to the next highest power.</em>

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How one rock can be transferred into either of the other rock type
mart [117]

Rocks can be classified in to three main groups - igneous, sedimentary and metamorphic. These three different rock types can be found in distinct areas of the UK.

Igneous rocks - these rocks are a result of volcanic activity in the past, when Britain was close to a plate boundary. Some of the igneous rocks are due to lava erupting at constructive plate boundaries. When the lava reached the surface, it cooled and solidified to form basalt rock. An example of this is the Giant's Causeway in Northern Ireland.

Other rocks are formed by hot molten magma beneath the Earth's surface cooling and solidifying as an intrusive rock under the ground, such as granite. This is later exposed as the rocks above are weathered and eroded at the Earth’s surface.

Sedimentary rocks – these are made up of small particles of sand and rock, which have been transported by the wind, rivers and ice and are usually deposited on lake or seabed. Over many millions of years, successive layers of sediments accumulate. These layers of sediments are compressed by the weight of the deposits above, into sedimentary rocks. These rocks form in layers, known as bedding planes.

When sand is compressed it forms sandstone. When mud is compressed it becomes clay. Limestone and chalk come from the remains of dead plant, animal and marine species and are rich in calcium carbonate and contain fossils. Many of these rocks were formed over 300 million years ago, in warm tropical seas during the carboniferous period. The existence of these rocks is evidence that Britain was at a different latitude compared to today. This suggests movement of continental areas of the globe, which is explained by the modern theory of plate tectonics.

Metamorphic rocks - these are rocks that have been changed in shape and form by intense heat and pressure at a plate boundary or along a fault line. These rocks start as either igneous or sedimentary rocks and are crystallised under the intense heat and pressure conditions to form rocks such as slates, schists, and marble. These rocks are very hard in nature and are often used as roof material.

short answer

The three main rock types are igneous, metamorphic and sedimentary. The three processes that change one rock to another are crystallization, metamorphism, and erosion and sedimentation. Any rock can transform into any other rock by passing through one or more of these processes. This creates the rock cycle.

3 0
2 years ago
Describe what happens during cell division
katovenus [111]

Answer: Most of the time when people refer to “cell division,” they mean mitosis, the process of making new body cells. Meiosis is the type of cell division that creates egg and sperm cells. During mitosis, a cell duplicates all of its contents, including its chromosomes, and splits to form two identical daughter cells.

Explanation: I copied this word for word off of google.

4 0
3 years ago
A portion of a polypeptide produced by a mammalian cell was found to have the following sequence of amino acids:...Lys-Ser-Pro-S
FinnZ [79.3K]

Answer:

j

Explanation:

6 0
3 years ago
What are Heterotrophs known as ?
Nata [24]

Answer:

An organism that doesnt not produce its own food

Explanation:

Heterotrophs are consumers who eat other organisms for food, while autotrophs or producers make food by process of photosynthesis.

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Which if these best describes a climax community? HELP IT'S FOR A TEST I DON'T HAVE MUCH TIME!!!
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The key point in a climax community is a population in equilibrium, or balance, with respect to both biotic and abiotic factors. The second answer choice would best describe such a community.

The other choices contain words that suggest a state of disequilibrium (“growing,” “booming population,” “decreasing population”).
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