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Tanya [424]
3 years ago
10

which of the following is true of mass? a. mass is never the same after a change. b. mass is always greater before a change. c.

mass is never destroyed in a change.
Biology
1 answer:
ElenaW [278]3 years ago
5 0
The answer is C, in lieu of the fact that in most all cases matter cannot be created or destroyed
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What is a pheromone
ludmilkaskok [199]
<span>a chemical substance produced and released into the environment by an animal, especially a mammal or an insect, affecting the behavior or physiology of others of its species.</span>
8 0
4 years ago
A) What type of cells express pattern recognition receptors (PRRs)? B) What is the primary role of PRRs in early host defense?
dimulka [17.4K]

Answer:

A) Dendritic cells and macrophages, although they are also found in other cells that belong, or not, to the immune system.

B) The innate immune response

Explanation:

The immune system is equipped with specialized receptors for the detection of pathogens such as bacteria or viruses, which are called receptors that recognize patterns (PRRs). These proteins are a key element in the innate system and are expressed primarily in antigen presenting cells, such as <u>dendritic cells and macrophages, although they are also found in other cells that belong, or not, to the immune system.</u>

<u> The innate immune response</u> begins with the recognition of highly conserved molecular structures and present in large groups of microorganisms called 'molecular patterns associated with pathogens' (PAMP). This recognition is done by the 'pattern recognition receptors' (RRP) of the host.

The best known bacterial PAMPs are:

Lipopolysaccharides (LPS)

Peptidoglucan

Lipoteic Acids

Mananas (Mannose )

Bacterial DNA

Double stranded RNA

Glucans

These PAMP are essential for the survival and pathogenicity of bacteria.

3 0
3 years ago
Habitat loss, soil erosion, and air pollution are disadvantages of which renewable energy source?
patriot [66]
I believe the answer is wind I'm not sure..Hope this helps!!
3 0
4 years ago
Name two examples of catastrophic events which could lead to a mass extinction?
Lemur [1.5K]

Asteroid impact

Volcanic eruptions

Explanation:

Asteroid impact and volcanic eruptions are two common events that could lead to a mass extinction.

A mass extinction is an abrupt decrease in life on earth due some catastrophic event.

  • The collision of a large bolide on the surface of the earth is a catastrophe in itself.
  • The collision and its aftermath have destructive consequences on life.
  • The force of the collision can reverberate in form of vibration throughout the earth.
  • It can cause heating of the earth surface.
  • Volcanic eruptions can become global phenomenon that upsets the earth balance.

Learn more:

Extinction brainly.com/question/10860460

#learnwithBrainly

8 0
3 years ago
Does Ajay's diet provide enough protein to meet his RDA of 0.8 g of protein per kilogram of body weight? Answer should include h
Westkost [7]

The given question is not complete, the complete question is:

Ajay decided to stop eating meat a year ago. Now that he is taking a nutrition class, he wonders if his vegetarian diet is as healthy as he thought. He is 22 years old, is 5’9” tall, weighs 154 pounds, and gets little exercise. His diet analysis is shown here:

Food

Serving

Energy (kcal)

Protein (g)

Fiber (g)

Sat Fat (g)

Breakfast

Frosted flakes

2 cups

320

3

2.7

0

Low-fat milk

1 cup

103

8

0

2

Orange juice

1 cup

112

2

0.5

0

Whole-wheat toast

2 slices

144

6

2.2

0

Butter

2 tsp

68

0

0

5

Coffee

1

0

0

0

0

Coffee creamer

1 T

30

0

0

2

Lunch

Cheese pizza (reg. crust)

2 slices

542

24

4

10

Potato chips

1 oz

155

2

1.2

3

Cola

12 oz

136

0

0

0

Ice cream sandwich

1

143

3

1

3

Dinner

Vegetable Lasagna

10 oz

400

18

4.8

7

Garlic bread

2 slices

189

4

1.5

1

Green salad

1 cup

22

2

3

0

Salad dressing

2 T

118

0

0.3

2

Ice cream

¾ cup

345

6

0

8

Iced tea

8 oz

90

0

0

0

Total

2917

78

21.2

43

Does Ajay’s diet provide enough protein to meet his RDA of 0.8g/kg of body weight? (2.2lbs = 1kg)

Answer:

The correct answer is yes.

Explanation:

RDA or recommended dietary allowance refers to the minimum amount of a nutrient, that is, regarded as essential for the proper functioning of the body or to sustain good health. The RDA is formulated by the Nutrition Board of the National Research Council.  

In the given case, the weight of Ajay is 154 pounds. In terms of kilograms, 1 kg is equivalent to 2.2 pounds.  

Thus, 154 pounds will be equal to 154/2.2 = 70 Kg.  

Based on RDA, the requirement of protein for a healthy individual should be 0.8 g/kg of the body weight. Therefore, Ajay needs to consume 70*0.8 = 56 grams of protein. However, based on his diet he is consuming 78 grams of proteins in a day. Hence, it can be concluded that Ajay is consuming adequate protein to meet his RDA.  

3 0
3 years ago
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