What would be the most effective method of reducing the inci

What would be the most effective method of reducing the incidence of blood flukes in human population? Reduce the mosquito population. Reduce the freshwater snail population. Purify all drinking water. Avoid contact with rodent droppings. Carefully wash all raw fruits and vegetables. 44. What evolutionary advantage is there to having the adult form? Motile larva, allow dispersal of species with sessile adults. Larva can explore different resources from adults. Differences allow adaptations to a seasonal climate. Adults may be the dispersal form when larvae have limited mobility. All of the above. Animals are distinct among multicellular organisms because their cells lack rigid cell walls and are flexible. they can move rapidly and are in more ways than members of other eukaryotic kingdoms. they develop from a zygote in a characteristic embryonic development. D. they show great diversity in size form and structure. all of the above choices are correct. How do sponges transport nutrients within their bodies? They have simple digestive and circulatory systems composed of sponging channels. They rely on diffusion to move nutrients between their cells. Their mobile amoebocytes transport food molecules from cell to cell They are not able to transport nutrients within their bodies, but must Independently absorb all necessary nutrients from the surrounding water. They not able to transport nutrients. They are autotrophs, so each cell Absorbs its own nutrients and produces its own food. Which of the following was not a challenge to survival of the first land plants? sources of water. desiccation. Sperm transfer. animal predation. Eabsorbing enough light.

Solution

43.The correct answer is: B.Reduce the fresh water snail population.

Reason:Snail is the intermediate host in blood flukes.

44.the correct answer is:A.Motile larva allow dispersal of species with sessile adults.

Reason: Sponges are seesile but their larval stages are motile.

45.The correct answer is :E.All of the above.

Reason:The above options are all correct.

46.The correct answer is:C.Their mobile amoebocytes transport food molecules from cell to cell.

Reason:The amoebocytes transfer food from choanocytes to other cells in the sponges.

47.The correct answer is :D.animal predation.

Reason:Animal predation was not a challenge to survival of first land plants.