Write a brief note on lymphatic system in human being.

Answers

Answer 1

Answer: the lymphatic system returns fluids and solutes from peripheral tissues to blood; produces, maintains, and distributes lymphocytes; distributes hormones, nutrients, and waste products from their tissues or origin to general circulation.

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Please HelpThe scientific theory of evolution says A- populations change over time in response to changes in the environment B- that all species are clones C- populations never change D- individuals have the same genes
The ordinary light microscope is called a bright-field microscope because _____.
Steps of Biological method of study taking malaria as an examples

An indirect measurement of the speed of molecules is _____. temperature friction energy

Answers

Answer: temperature

Temperature is a degree of hotness or coldness measured on a definite scale on an instrument called as thermometer. It actually measures the kinetic energy of randomly moving particles or molecules of air in an atmosphere, living system or entity under study in a constant speed.

An indirect measurement of the speed of molecules is temperature. It can be measured with a thermometer.

To test the effect of hormones on plant growth, six potted plant seedlings of the same species were measured and then sprayed with auxin (a growth hormone). After four weeks of growth under ideal conditions, the plants were measured again. To set up a proper control for this experiment, the investigator should what do?

Answers

Answer:

The investigator needs to add a negative and a positive control. The positive control can be an auxin previously tested on this plant species, and the negative control should be a NON AUXIN SPRAYED plant, it can be sprayed with disstilled water. It is importan that all these plants are exactly under the same conditions (temperature, light, etc.), but with a distance between them that does not allow crossed contamination.

Explanation:

Final answer:

In this experiment, the investigator should establish a control by growing the same plant species without the auxin under the same conditions. This allows them to compare plant development with and without the growth hormone, verifying its effect.

Explanation:

To set up a proper control for this experiment, the investigator should maintain another set of six potted plant seedlings of the same species but without spraying them with auxin. These plants will then be grown under the same ideal conditions for the same duration. This control group will allow the investigator to compare the growth and development of plants without the hormone against those with the hormone, demonstrating any effects the growth hormone may have had.

Controls in experiments like these are crucial because they assist in determining the specificity of the effects of the variables being tested, in this case, the plant hormones. Without a control group, it would be impossible to definitively assign any observed changes to the application of auxin.

Learn more about Control in Experiments here:

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Is an organelle living or nonliving?

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Organelle is nonliving because it doesn't need water to stay alive or air or food.
Hope I helped:P

9. Which of the following plant hormones is responsible for inhibiting cell division and promoting dormancy? A. Auxins B. Ethylene C. Abscisic acid D. Cytokinins

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The right answer here is D - Cytokinins. These are the plant hormones which control the development process in plant, through an inhibition of cell division and the promotion of dormancy amongst certain cells that lead to the plant slowing growth.

What makes plants appear green to the human eye? A. Chlorophyll pigment B. Cellulose in cell walls C. Xanthophyll pigments D. Carotenoid pigments

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A. Chlorophyll pigment

__________ are areas around the world that support similar communities of species, and __________ are smaller, local communities within these areas.a. Biomes . . . ecosystems
b. Elevations . . . biomes
c. Biomes . . . elevations
d. Ecosystems . . . climates

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Answer: a. Biomes . . . ecosystems

Explanation:

A biome is the region which includes the communities of living beings such as plants and animals. These are found in the range of the continents. The organisms living in a particular biome shows the characteristics typical to the biome and adaptations specific to the biome. Biomes becomes different on the basis of the physical climatic conditions specific to them.

The ecosystem is the communities of the species found in the biome. There are many ecosystems in the single biome.

a. Biomes...ecosystems.
Biomes are comprised of ecosystems.

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8. Some saliva was mixed with water and placed in a test-tube labelled A to which some boiled, cooled starch was added. Two other test-tube B and C were prepared as follows: Test-tube B-water and saliva Test-tube C water and starch. The three test-tube placed in water bah at 37°C and allowed to stand in the water for 5 minutes. A few drops were removed from each test-tube with a piece of glass tubing and tested with iodine solution and Benedict's solution. (a) Which of the test-tubes contained a solution that gave an orange precipitate with Benedict's solution? (1 mark)