BIOLOGY HIGH SCHOOL

One of the most important reasons for using reliable water sources is to reduce

Answers

Answer 1
Answer: Is to reduce faecal-oral diseases of which diarrhea, estimated to kill over three million people a year. 

An adequate quantity of water, is more important in controlling non-epidemic disease and allows better hygiene and thus can prevent disease. Sanitation alone has its greatest impact on infections. And better results come from observing practical outcomes such as the use and maintenance status of facilities, or improvements in hygiene practice. 

Related Questions

What is created using the sugars that areproduced during photosynthesisA. seedsB. starchesC. fiberHelppp pls
Organisms may contain up to five levels of organization within their bodies. Which level of organization is best represented by the liver?tissueorganorganismorgan system
In humans, having freckles is the result of a dominant gene, and not having freckles is a recessive trait. If a freckled man who is homozygous for this trait has a child with a woman who does not have freckles, which of the following best describes how their child would most likely appear?A. Their child would not have freckles if the father passes on the recessive allele.B. Their child would have freckles.C. Their child would not have freckles.D. Their child would have freckles since the mother is a carrier for freckles.Can someone explain this for me ?
Which statement about sister chromatids is true?
How are gene pairs written out?

An anthropologist discovers the fossilized heart of an extinct animal. The evidence indicates that the organism's heart was large, well-formed, and had four chambers, with no connection between the right and left sides. A reasonable conclusion supported by these observations is that the animal wasA) most closely related to mammals.B) most closely related to fish.C) most closely related to reptiles.D) most closely realted to athropods and molluscs. E) most closely related to amphibians.

Answers

Answer:

Option A, most closely related to mammals

Explanation:

Insects like arthropods and molluscs have an open circulatory system and thus do have a distinguishable heart. Fish has two chambered heart. Reptiles have three chambered heart. Amphibians too have a three chambered heart.  

All mammals and fish have four chambered heart. The right and left sides of the chambers have restricted entry and hence remain intact from each other

Hence, option A is correct

 

Plant cells have a _____ while animal cells do not. A. plasma membrane B. nucleus C. cell wall

Answers

The answer is C. cell wall. Plant cells have a cell wall while animal cells do not. Plant cells' cell wall is mostly made of cellulose, which is a polysaccharide.
Plant cells have a cell wall, while animal cells do not. They both, however, have a plasma membrane and a nucleus.

Question 1 (1 point)The atlas would fall into which category of bones?
a. Short
b. long
C. irregular
d. flat

Answers

Answer:

Flat

Explanation:

The atlas is one of the two upper cervical vertebrae, also known as C1, which is the topmost vertebra of the spinal column. ... It is the vertebra that is in contact with the occipital bone, a flat bone located at the back portion of the head.

Primary succession would most likely occur after? a forest fire. a lava flow. farm land is abandoned. a severe storm.

Answers

'The best answer is a lava flow. Primary succession happens in lifeless areas or regions where soil is not capable of sustaining life which may be caused by lave flows, retreating glaciers or newly formed sand dunes. It is one of the two types of biological and ecological succession.

One difference between algae and plants is that _____.plants have roots, stems, or leaves,
plants conduct photosynthesis,
plants are multicellular

Answers

Answer: plants have roots, stems, or leaves

Algae and plants are similar organisms because both are autotrophic organisms which are able to produce their own food by the process of photosynthesis. The main difference between the two is the level of complexity. Algae are comparatively simple organisms, their structure ranges from single celled to multi-cellular organisms. They do not exhibit true roots, stems and leaves like plants. The plants exhibit complex specialized structure for transport of water, nutrients and to perform reproduction. The smallest to largest plant will exhibit roots, stems and leaves.

Cell membranes are often called a "fluid mosaic" of lipids and proteins. What is the role of the cell membrane structures? Structurally support the cell Store nutrients for the cell to consume Produce ATP to provide energy for the cell Selectively allow some materials into the cell

Answers

A .Structurally support the cell 
B.Store nutrients for the cell to consume 
C. Produce ATP to provide energy for the cell 
D. Selectively allow some materials into the cell

It would be A

The Cell membrane is like a wall it allows things to pass though regulated.


Hope that helps
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All of the following types of students have specific grant opportunities based on personal traits except:a. American Indian students.b. disabled students.c. children of congressional leaders.d. female students.
If a smoker has a low tidal volume why might he feel tired and run down
Which structure is not made up of RNA?a. mRNAb. tRNAc. ribosomed. amino acids
Which structure does a eukaryotic cell have that a prokaryotic cell does not have?