Which of the following is an unsegmented worm with a pseudocoelom.A. sponge
B. cnidarian
C. arthropod
D. roundworm

Answers

Answer 1
Answer: Is not a sponge, cnidarian or arthropods . The pseudocoelom is specific to any invertebrates with three body layers. So, your answer is D - roundworm 
Answer 2
Answer:

The correct answer is option D, Round worm

Roundworm belongs to the phylum  Nematodes and some common characteristics of Nematodes are – they are small, slender , un-segmented, smooth and shiny. Roundworm has   a round body just like a spiny –headed worm which do not have segments . Also they possess a body cavity known as pseudocoel in which the internal body organs lie and the body cavity is not lined with mesodermal cells.  


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What is the ultimate source of heat in the process of global warming
If a chemical reaction is reversed, what happens to the enthalpy of the reaction?A. The enthalpy of the reaction becomes zero. B. The enthalpy of the reaction doubles. C. The sign of the enthalpy of the reaction reverses. D. The enthalpy of the reaction is halved.

What type of vegetation is not frequently found in the tundra?a. mosses
b. shrubs
c. lichens
d. trees

Answers

The answer is d. trees.

The vegetation of the tundra is composed of shrubs, grasses, mosses, lichens. Tree vegetation is very rare because of low temperature and short growing season. In the tundra, soil is frozen, and tree growth is blocked since they cannot absorb the amount of water they need. 

The type of vegetation that is not frequently found in the tundra is D.Trees.

Technological advances in transportation have come about in response to the depletion of fossil fuels and other negative aspects of the internal combustion engine. There are many positives to these advancements, but there are also some negatives. Which statement is a negative aspect of these advancements?

Answers

This is causing pollution and definitely the harm to the natural resources. The over population and the over usage is causing an imbalance in the issue.

What are the names of fossil fuels ?

These are coal and petroleum that are being used by the people on Earth.

Depletion of fossil fuels firstly is like that they are just decreasing in number and not only that with that we are running out of fuels as well which is not a good sign to cope up with the nature and stay in equilibrium with each other.

It is definitely the contributor to the economy but not only that we are facing the big chain of certain taxes and the kind of problems in  them are they are very expensive and not available to everyone with that they are being coming with a huge amount of taxes on them.

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Answer:

D) These advancements are very expensive and not available to everyone.

Explanation:

Which of the following human activities does NOT release carbon dioxide into the atmosphere?Burning fossil fuels
Fishing
Deforestation

Answers

Fishing is a human activities that does not release carbon dioxide into the atmosphere.

What is human activities?

  "Human activities are the various actions for recreation, living, or necessity done by people."

What is carbon dioxide?

  • "Carbon dioxide (CO2) is an important heat-trapping (greenhouse) gas."
  • It is released through human activities such as deforestation and burning fossil fuels, as well as natural processes such as respiration and volcanic eruptions.
  • It is one of the greenhouse gases.

What is deforestation?

  • "The action of clearing a wide area of trees."

What are fossil fuels?

  • "Fossil fuels are made from decomposing plants and animals. These fuels are found in the Earth's crust and contain carbon and hydrogen, which can be burned for energy."

By deforestation and burning of fossil fuels large amount of carbon dioxide gases are released into atmosphere.

Hence, carbon dioxide is not released into atmosphere by fishing.

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The Fish does not give off Carbon Dioxide

What is the habitat of a blue shark

Answers

They inhabit deep waters in temperate and tropical oceans, generally preferring the cooler areas of said waters.
they sea ,reef were the fish are to feed or mates

portion of this DNA, known as a ________, is responsible for the inheritance of a trait, like eye color or blood type in humans. A) chromosome B) codon C) gene D) nucleotide

Answers

The answer is C) gene. Chromosome is a thread-like structure in the nucleus that consists of DNA and proteins. The basic units of DNA are nucleotides. A sequence of three nucleotides is known as codon. A gene is a sequence of nucleotides, i.e. portion of DNA responsible for the inheritance of different traits, such as eye color or blood type. Thus, the correct choice is C).

The answer is C: Gene

In parasitism, the organism that is helped is called the ___ while that which is harmed is called the ___ .

Answers

Answer: The correct answer for the blank is - Parasite and Host.

Parasitism is a type of biological interaction between two organisms where one organism lives on the surface or inside the body of another organism in order to complete its life cycle and obtain essential nutrients. This organism is called parasite and the other is called host, which is harmed usually by that parasite.

In parasitism, the organism that is helped is called the parasite while that which is harmed is called the host.