You wanted to track the spread of the invasive polyphagous shot-hole borer, so e

Question

You wanted to track the spread of the invasive polyphagous shot-hole borer, so each year for the last 3 years you counted the number of trees in the Arroyo that were infested with them. This is an example of:

The biggest threat to Johnson's seagrass is:

Which of the answers below could be a hypothesis related to the the contents of the box you examined in lab?

When placing a slide on the microscope in lab ______________.

Plants that lack vascular tissue are called

In the Arroyo Seco the tree squirrels and the native woods rats are observed to build nests in the same old growth Live Oak trees. Theses nesting sites are limited. Which relationship would best describe these two species?

The small white insects (cochineal) that live on the Beaver Tail cactus in the Arroyo Seco suck sap and water from the cactus without providing anything for the cactus in return. This is an example of ______.

Invasive species can have important effects on biological communities by ______.

Explanation / Answer

Ans 1) Counting the number of trees infested by the shot hole borer is included in observational study because we are not manipulating the conditions and we are just observing and counting the number of infected trees

Ans2) The biggest threat to Johnson seagrass is habitat loss .Due to its Habitat destruction it has already become an endangered species

Ans3) From the above statements the statement that box contains a metal or metal like object is a hypothesis .This is because a hypothesis is a statement that is just given .No observations are required for giving the hypothesis and the hypothesis is then checked by experiments and observations.

Ans4) While placing the slide under the microscope make sure that the slide is secure under the clips so that the slide then becomes fixed and you can adjust the magnification easily by moving the stage and not the slide.

Ans5) plants that lack vascular tissues are known as bryophytes .They are the most primitive plants and do not have xylem or phloem.

Ans6) The species of rat and squirrel live closely and are benefited from each other and their food this relationship will be described as mutualism

Ans7) This is an example of commensalism because only one species is being benefited from the interaction .

Ans8) All the above statements are correct

This is because whenever an invasive species attacks on a place then it shares the resources with the native species sometimes it may even take over the native species.

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