During cellular respiration, every living thing in this food web uses ______ gas and releases ______ back into the environment. A. carbon dioxide: oxygen
B. oxygen: carbon dioxide
C. carbon dioxide: hydrogen
D. carbon dioxide: water vapor

1. The right answer is d. A and B only.

On September 8, 2017, the earth shook in Mexico on the night of Thursday to Friday. An earthquake measuring 8.2 on the Richter scale hit the south of the country off the coast of Chiapas state, according to the US Geospatial Monitoring Center (USGS). The shock was felt as far as the capital, Mexico City.

2. The right answer is e. A, B, and C.

El Niño, and its La Niña counterpart, are large-scale oceanic phenomena of the equatorial Pacific Ocean, affecting the wind regime, sea temperature, and precipitation. El Niño and La Niña correspond to the two opposite phases of the coupled ocean / atmosphere phenomenon called ENSO (El Niño / Southern Oscillation).

Originally, the name El Niño was attributed by Peruvian fishermen to the small invasion of hot water that occurs every year along the coasts of Peru and Ecuador around Christmas - hence its name: in Spanish, El Niño means the child Jesus. By extension, the climatic phenomenon corresponding to the increased warming of surface waters near the coast of South America is now called El Niño. We know that it is linked to a cycle of changes in atmospheric pressure between the east and west Pacific, coupled with a cycle of ocean current along the equator.

Only ENSO has such a marked global impact. The other two ocean basins, Indian and Atlantic, are too small to allow such an important coupling between atmospheric and oceanic circulation, even if they also undergo deep water upwelling and trade winds.

Answer:

Option C

Explanation:

Given -

The probability of a bowler getting a strike during a particular frame %

Solution:

Probability of a bowler getting a strike during a particular frame is independent of frames.

Thus,

Probability of a bowler getting a strike during a single frame %

Probability of a bowler getting a strike during a double frame

≈ %

Answer:

The Correct Answer is Both "A" and "B"

Explanation:

Answer:

The Correct answer is B, Staphylococcus.

Explanation:

The Catalase test is used to differentiate Staphylococci (Catalase positive) from Streptococci (Catalyst negative). The enzyme catalase is produced by bacteria that respire using oxygen and protects them from the toxic by-products of oxygen metabolism.

Catalase positive bacteria includes strict aerobes as well as facultative anaerobes. Catalase negative bacteria maybe anarobes or facultative anarobes that only ferment and don't respire using oxygen as terminal electron acceptor.

Catalase converts hydrogen peroxide to water and oxygen gas. Though both Staphylococcus and Streptococcus are gram positive bacteria, only Staphylococcus produces catalase enzymes.

The correct answer is option a. viruses are not living since they are smaller than a cell.

The cell theory does not propose the explanation for the viruses. As the viruses were discovered by Dmitry Ivanovsky in 1892, after the cell theory was proposed.

After advancement in microscopy, in year 1838 Schleiden and Schwann proposed cell theory.

The cell theory proposed by Schleiden and Schwann suggested that all the living organism are made up of cell. These cells are the smallest unit, which can perform all the function, which is required for a life, they can also divide,  hence, it is the functional unit in all forms of life. They also said that a living organism at least have a cell or more than one cell.

Answer:

The correct answer would be an option a.

Cell theory was mainly formulated Matthias Schleiden and Theodor Schwann in 1839.  

They postulated that:

All cells arise from pre-existing cells.

Each living organism consists of one or more types of cells.

The cell is a basic functional and structural unit of all living organisms.

Thus, option a. would be the correct answer.