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Mrac [35]
2 years ago
5

Q16.A needle can be made to "float" on the surface tension of water. What causes this surface tension to form?

Biology
1 answer:
Sunny_sXe [5.5K]2 years ago
6 0

Answer:

B

Explanation:

Water has surface tension due to cohesion that allows it to 'stick' together. This cohesion is created by the fact that water is polar and has unequal distribution of charges. The oxygen becomes slightly negative as it is surrounded by positive hydrogen. In turn, the hyrdogen becomes slightly positive.

This means that the hydrogen molecule is temporarily attracted to the oxygen of another molecule. This causes surface tension and allows light objects to float on top of it

Hope this helps!

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Salt is notoriously dangerous to land snails; however, some populations of aquatic, freshwater snail have brackish (or a mix of
Mashutka [201]

Answer:

The brackish water adaptation is clearly necessary because the aquatic snails need to live in an environment in which the river system has a higher quantity of salt than what land snails can take. I can determine that the environmental factors influenced the inherited adaptations because the second population has a higher salt concentration in their habitat compared to the initial population.

8 0
3 years ago
Name three social benefits provided by biodiversity.
damaskus [11]

There are many benefits provided by biodiversity. It can be in our biological resources, ecosystem services and also social benefits. The three social benefits provided by biodiversity would be the following:

1. Research, education and monitoring 

2. Recreation & tourism 

3. Cultural values 

Explanation:

Biodiversity is “the variability among existing animals from all causes including temporal, marine and other aquatic ecosystems, and the environmental complex.

Pollinators, including bees and butterflies, contribute meaningful environmental and economic advantages to agricultural and essential ecosystems, including adding heterogeneity and productivity to food crops. As many as one-third of the world's food production relies directly or indirectly on insect pollination.

7 0
3 years ago
Read 2 more answers
How does the available staff influence the selection of either continuous electronic or intermittent auscultation as the fetal-m
kondaur [170]

Answer:

The options

a. There must be a 1:1 nurse-to-patient ratio regardless of the method used.

b. Staffing patterns do not influence fetal monitoring choices.

c. Use of intermittent auscultation requires a lower nurse-to-patient ratio.

d. More nurses are needed when electronic fetal monitoring is used because of increased medical interventions.

The ANSWER is c.

c. Use of intermittent auscultation requires a lower nurse-to-patient ratio.

Explanation:

a. There must be a 1:1 nurse-to-patient ratio regardless of the method used.❌

A one-to-one ratio is important at the second phase of labor or in occurrence of a high-risk condition, irrespective of the monitoring method applied.

b. Staffing patterns do not influence fetal monitoring choices.❌

Staffing patterns do have an influence in conserving safe monitoring routine of the labor patient.

c. Use of intermittent auscultation requires a lower nurse-to-patient ratio.✔

Intermittent auscultation is largely staff-intensive.

d. More nurses are needed when electronic fetal monitoring is used because of increased medical ❌

Reduced nursing time is needed when carrying out electronic monitoring, this will allow the nurse to have increased time for educating, encouraging and supporting the laboring woman.

6 0
3 years ago
Arrange the events in the life cycle of mosses in the flowchart below. Start the life cycle with the mature sporophyte stage in
labwork [276]

Answer:

Life cycle of a moss

Explanation:

LIFE CYCLE OF A MOSS FROM MATURED SPOROPHYTE STAGE

An embryo further develops into a pear-shaped  sporangium, which is the *sporophyte  stage of the plant*. The sporangium  contains spore sacs, each of which is the spore mother cell that undergoes meiotic division  to form four spores,The spores are released and germination

takes  place giving  rise to a protonema, which develops into a new gametophyte plant. The gametophyte  generation or haploid phase of the moss is from the production  of haploid spores after meiosis  to the period just before fusion of the haploid antherizoid or haploid ovum. The sporophyte generation or diploid  phase is from the diploid  mother cells just before meiosis.

Examples of moss plants include Funaria hygrometrica, Polytrichum commune, Barbuda Indica.

8 0
3 years ago
Fred discovered a new organism. It is eukaryotic and multicellular, and it flies to get its food, which is a type of grass. Whic
denpristay [2]

Answer: Animals

Explanation:  Animal cells are eukaryotic but so are plants. However, only an animal can fly to get its food. Plants get their food by the sun or by themselves.

Hope that helped! :)

5 0
3 years ago
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