Are viruses alive? This question is debated among scientists throughout the world.

From where did the carbon in all living things come?

-Dominant- [34]

Answer:

Option B, It was made in stars that lived before the solar system formed.

Explanation:

Almost all the carbon that exists today with in the living organisms was produced in the stars. When these stars exploded during the big bang theory all the carbon within hem was introduced in the environment of earth some billions of years ago. Hence , though carbon introduced in earth’s environment was due to big bang, its origin is from the stars. Hence option B is the correct answer

Cyanobacteria is responsible for generation of oxygen on planet earth and thus option D is in correct.

7 0

3 years ago

Which diagrams shows reaction pathway that absorbs energy?

postnew [5]

Question:

<em>The diagram shows the potential energy changes for a reaction pathway.</em>

Part 1: Does the diagram illustrate an endothermic or an exothermic reaction? Give reasons in support of your answer.

Part 2: Describe how you can determine the total change in enthalpy and activation energy from the diagram and if each is positive or negative.

Answer:

Part 1: The diagram illustrates an endothermic reaction as the products has a higher potential energy than the reactants do. There is a positive slope of the diagram and there is enough energy to meet the activation energy requirement.

Part 2: You can determine the total change in enthalpy and activation energy from the diagram by the potential energy of the reactants. If the reactants have a high potential energy, then the enthalpy is also high, and if the reactants have a low potential energy, then the enthalpy is low. You can determine if the diagram is positive or negative by knowing if its an endothermic or exothermic reaction. An endothermic reaction is positive because the products are higher than the reactants and a exothermic reaction is negative because the reactants are higher than the products.

8 0

3 years ago

What is the vector for malaria?

frutty [35]

Vector: anything that transmits a disease.

Malaria vectors can include mosquitos, ticks, and other blood sucking insects.

P.S.: Hope I Helped :)

7 0

3 years ago

What is the name of each animal... for example at no. 3, there is a cat. Also tell whether it is a herbivore, carnivore, omnivor

Sindrei [870]

Answer:

1. Grass, producer

2. Mouse, herbivore

3. Cat, Carnivore

4. Mushrooms, decomposer

Explanation:

5 0

3 years ago

Read 2 more answers

The perirhinal cortex is particularly important in ________ and receives more input from ________ than from ___________

dedylja [7]

The perirhinal cortex is particularly important in visual recognition and receives more input from the occipital lobe than from other cortical areas. In addition, the perirhinal cortex is a cortical region in the medial temporal lobe that is made up of Brodmann areas 35 and 36. It obtains highly administered sensory information from all sensory regions and is usually accepted to be a significant region for memory.

6 0

3 years ago