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adoni [48]
3 years ago
12

In a recent experiment, anti-bacterial hand sanitizer was compared to hand soap. Students washed their hands using the sanitizer

or soap and warm water for two minutes; then they dried their hands with a paper towel. The standard of comparison was rubbing hands vigorously for 2 minutes in warm water, without any soap or sanitizer, and then drying with a paper towel. The sanitizer advertisement claimed to kill bacteria more effectively than any soap. After washing, hands were swabbed and then the swab applied to a culture plate and incubated. Finally, the bacterial cultures were counted and recorded in the data table.
What would be a valid conclusion to draw from this data?

A) All methods are effective in killing bacteria.
B) Both soap brands out perform hand sanitizer in killing bacteria.
C) Warm water is as effective as soap or sanitizer in killing bacteria.
D) Hand sanitizer is more effective than either soap in killing bacteria.
Biology
1 answer:
Rainbow [258]3 years ago
7 0

Answer:

B

Explanation:

The soap brands cultivated less bacteria culture than the warm water and hand sanitizer.

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The sternal angleis the least likely part of A. the sternum to fracture in the elderly. B. occurs at the sternoclavicular joint.
Bumek [7]

Sternal angle marks the joint between the sternum and the 2nd rib.

Option E.

<h3><u>Explanation:</u></h3>

Sternum is the breast bone which is a dorsi ventrally flattened bone present in thorax of human. It gives the support for the ribs where the ribs join. A sternum has three parts - Manubrium sterni, body of sternum and the xyphoid process.

The sternum has attachments of a total of 10 ribs and clavicle. The clavicle and the first rib joins in the Manubrium sterni, and the 3rd to 10th rib joins in the body of sternum. The 2nd rib joins in a facet which is partly in Manubrium sterni and partly in body of sternum. This place id also called the sternal angle. So the sternal angle marks the joint of 2nd rib to sternum.

3 0
3 years ago
An organism’s traits are determined by the specific combination of inherited _____.
goldfiish [28.3K]

Answer:

Genes.

Explanation:

Genes are present on DNA that are inherited from parents to their offspring. Genes may be defined as the segment of DNA that ultimately form a particular protein product.

The particular trait of an organism is determined by the specific combination of the inherited genes. The genes are nearly same in all the human beings and there mutation can cause observable phenotype traits.

Thus, the correct answer is option (2).

3 0
3 years ago
Bào quan nào sau đây đảm nhiệm chức năng tổng hợp và vận chuyển các chất?
Mandarinka [93]

Answer:

Trung thể.

Explanation:

3 0
3 years ago
A common species of liverwort typically resembles a flat green ribbon that occasionally sprouts umbrella-shaped structures. If l
creativ13 [48]

Answer:

1. Gametophyte

2. Sporophyte

Explanation:

The life cycle of the Liverwort and mosses which are placed in the Bryophytes is divided into the sporophytic and the gametophytic phase.

Gametophyte

The gametophyte is the dominant phase of the life cycle which appears like the ribbon, green in color and posses the gamete producing structure- the antheridium and the archegonium.  

Sporophyte

The gametes fuse to form the embryo and from that is produced the sporophyte structure, an umbrella-like structure called a sporangium. This sporangium produces the spores which later will form the gametophyte.

6 0
2 years ago
What is the best source of vitamin C?<br> - Cheddar Cheese<br> -strawberries<br> -lentils
seraphim [82]
<span>-strawberries i hope dis helps you</span>
3 0
3 years ago
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