Question

Which compound can provide the energy for chemosynthesis?(1 point)
Responses

hydrogen sulfide
hydrogen sulfide

water
water

carbon dioxide
carbon dioxide

oxygen

Answer 1

The compound that can provide the energy for chemosynthesis is **hydrogen sulfide**. Chemosynthetic organisms, such as certain bacteria, use hydrogen sulfide as a source of energy to convert carbon dioxide into organic compounds.

Answer 2

Which extremophile produces enzymes used in the production of detergents?(1 point)
Responses

anaerobes
anaerobes

alkaliphiles
alkaliphiles

methanogens
methanogens

acidophiles

Answer 3

The extremophile that produces enzymes used in the production of detergents is **alkaliphiles**. Alkaliphilic microbes thrive in high pH environments and produce enzymes, such as proteases and lipases, that are effective in alkaline conditions, making them valuable in detergent formulation.

Answer 4

Which organism provides evidence that matter and energy can be cycled through an ecosystem without sunlight?(1 point)
Responses

a lion in an African savanna
a lion in an African savanna

a tree in a South American rain forest
a tree in a South American rain forest

a lanternfish on the Atlantic Ocean floor
a lanternfish on the Atlantic Ocean floor

a bison in a North American prairie

Answer 5

The organism that provides evidence that matter and energy can be cycled through an ecosystem without sunlight is **a lanternfish on the Atlantic Ocean floor**. Lanternfish are part of deep-sea ecosystems that rely on chemosynthesis and other biological processes not dependent on sunlight, demonstrating how energy and matter can be cycled in the absence of light.

Answer 6

Suppose you are an exterminator of organisms that undergo chemosynthesis. Which technique will prove most effective to eliminate the greatest number of organisms?(1 point)
Responses

decrease the temperature
decrease the temperature

remove methane and hydrogen sulfide
remove methane and hydrogen sulfide

remove oxygen and carbon dioxide
remove oxygen and carbon dioxide

block sunlight

Answer 7

To eliminate the greatest number of organisms that undergo chemosynthesis, the most effective technique would be to **remove methane and hydrogen sulfide**. Many chemosynthetic organisms rely on these compounds as energy sources for their metabolic processes. Without them, the ability of these organisms to survive and thrive would be significantly compromised.

Answer 8

Suppose a probe is sent to Europa, one of Jupiter's moons, to explore its ocean. Which discovery would make the existence of extremophiles in Europa's ocean less plausible?(1 point)
Responses

the ocean being acidic or basic
the ocean being acidic or basic

the ocean lacking methane or hydrogen sulfide
the ocean lacking methane or hydrogen sulfide

the ice blocking all sunlight to the ocean
the ice blocking all sunlight to the ocean

the ocean being very salty

Answer 9

The discovery that would make the existence of extremophiles in Europa's ocean less plausible would be **the ocean lacking methane or hydrogen sulfide**. Many extremophiles, especially those that undergo chemosynthesis, rely on these compounds as energy sources. If these essential energy sources are absent, it would be challenging for chemosynthetic extremophiles to survive.