b. in the pycnocline
c. on or in the ocean bottom
d. traveling in ocean currents
Answer: Option C
Explanation: Benthos organisms can be defined as the set organisms that live in the in or near the seabed of the river, lake or stream bottom which is also called as benthic zone.
These organisms live in the sedimentary environment. They have certain adadptations to live in the high pressure conditions.
The food source of animals living in this zone is organic matter, dead and decaying organic matter.
Answer:Burrows are all of the above: (A) made by animals, (B) a type of trace fossil, and (C) fossils of worm tunnels.
explanation : (A) Burrows are structures created by animals for various purposes, such as shelter, protection, or nesting. Many animals, including insects, mammals, and birds, dig burrows in the ground or construct burrows within trees or other structures. These burrows serve as homes or hiding places for the animals.
(B) Burrows can also be considered trace fossils. Trace fossils are evidence of past animal activity preserved in the geological record. These traces provide valuable information about the behavior and ecological interactions of animals that lived in the past. Burrows are one type of trace fossil, along with tracks, trails, and other marks left by organisms.
(C) Some burrows are specifically created by worms. Worms, such as earthworms, create tunnels in soil or sediment as they move and feed. These worm burrows are often preserved in the rock record as fossils, providing evidence of the presence and activity of worms in ancient environments.
To summarize, burrows are structures made by animals, they can be considered trace fossils, and some burrows are specifically created by worms.
OPTIONS:
a. The organisms vary in trait
b. The variation is inherited
c. More young are born than can survive
d. Some individuals are better adapted to the environment
Answer:
d. Some individuals are better adapted to the environment
Explanation:
Kettlewell’s biological experiment, which was conducted in England, was to study the evolutionary changes taking place in trees in relation to the appearance of dark-colored moth.
It was observed that white moths were more common before the industrial revolution. After the industrial revolution, which changed the background of the environment of the moths due to pollution, the moths became easily seen and obvious to predatory birds.
It was discovered that peppered moths were selectively preyed on by birds depending on their body color, which serves as the most important factor that determines if moths can survive predation by blending with the background of their environment. This led to the evolving of moths of their color to blend with the background of their environment, which makes them hide from the birds that prey on them.
Kettlewell was trying to verify the factor in evolution by natural selection, which says, “some individuals are better adapted to the environment”.
They will gather qualitative data using a meter stick and a graduated cylinder