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2 years ago

explain how a toxin in a food web will harm some while killing others why did the mosquito and cats die while other things lived

Biology

2 answers:

Oxana [17]2 years ago

7 0

Answer:

in a food web harm it because the toxins harm one specie while harming others also. When that species is harmed other species that consume them will get intoxicated also.The mosquitos died because those toxins were made to kill them, and the cats died because those toxins spread throughout the food web.Explanation:

vladimir1956 [14]2 years ago

4 0

I think that a toxin that was introduced into a food web can kill some species but not others because some may have resistances to the toxin, while others, it may be lethal. Also that it did not affect everyone because as Bioaccumulation has stated if affected one organism but their might not be much biomagnification as in much increase in the correlation between the food chains in that area. i think the cat were like the top animal so the key stone animal of the food chain and also it had no predators.

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Why is it better to describe ion formation as a “transfer of electrons” rather than as “losing and gaining” electrons?

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Explanation:

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2 years ago

5. Fish use ___gills________ to breathe underwater. (However, many species of lobe-finned fishes that evolved during the Devonia

marusya05 [52]

Answer:

During the Devonian period which occurs 375 million years ago, gills are present in the fossil of tetrapods.

Explanation:

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2 years ago

Compare and contrast light microscopes, scanning electron microscopes, and transmission electron microscopes. Sort each statemen

podryga [215]

Answer:

Light microscope:

use a beam of light to produce magnified images
can be used to examine living cells and tissues

Scanning electron microscope:

use a beam of electrons to produce magnified images
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Transmission electron microscope:

use a beam of electrons to produce magnified images
can be used to examine DNA
can be used to examine cells

Explanation:

Light microscope: is a commonly used microscope also known as compound microscope. Magnifies images from 40X upto 1000X. It uses ray of visible light to produce a magnified image. The light microscope can be used to view specimen of both living and dead cells or tissues. However, it doesn't give a detailed view of a specimen like electron microscope.

Scanning electron microscope: It uses electron beam as an illuminating source. It has a much higher resolving power than light microscope because it uses electrons instead of light. It magnifies object upto 500000 times the actual size. Internal structures can also be viewed. However, only dead specimen can be used because the beam of electrons can kill the cells. They are of two types:

Scanning electron microscope(SEM): an electron beam passes over the specimen's surface and displaces electrons which are then focused on a screen to form an image. Images appear in 3-D
Transmission electron microscope: electromagnets magnify the image by passing beam of electrons through a thin specimen. Images appear in 2-D

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2 years ago

To perform the experiment, Jared will follow these instructions: Put one or two ice cubes in one cup of water. Chill the cup of

MArishka [77]

Answer:

A) how the temperature of water affects photosynthesis.

Explanation:

Photosynthesis is a process in which plants transform light into chemical energy. They require water and sunlight to grow. During the process light energy is absorbed by plants and they consume water, carbon dioxide and some mineral from soil to produce oxygen by a chemical reaction. Jared is also considering to analyse the different water temperatures. The higher temperature of water will enhance the rate of photosynthesis.

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2 years ago

Saved Roughly half of the diversity in Phylum Chordata belongs to ray-finned fishes (clade Actinopterygii). Which of the followi

e-lub [12.9K]

Answer:

d. Tetrapods.

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The Tetrapods are four limbed animal which contains extincts of mammal, reptile and amphibian. They belong to Phylum chordata. Tetrapods includes land living vertebrates such as frogs, harks, sea lions etc. To be categorized in phylum Chordata the the chordate should possess pharyngeal slits, post tail and dorsal nerve chord.

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2 years ago

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