Question

1. A striped barnacle lives on a rock at the intertidal level of coastline. It can live from the highest tides to the lowest tides and below. It does not live in these areas because the rock barnacle excludes the striped barnacle from the lower tidal areas. The striped barnacle's specific environment as a result of this competition for space is called its
2. Many organisms live with or on other organisms. Your gut has many bacteria that help in digestion and water absorption. Which symbiotic relationship would this be?
3. Prey have many adaptations that help them avoid being eaten by predators. A physical barrier to being eaten is referred to as:
4. Which of the following is an example of commensalism?
5. Using the diagram from the previous question, which of the following is not a producer?
6. Using the diagram from the previous questions, which of the following is not a primary consumer?
7. Using the diagram from the previous questions, which trophic levels does the bass occupy?
8. Which action influences the abiotic components of an environment?
9. Dry regions on the leeward side of mountain ranges are referred to as:
10. Introduced species into the United States can have deleterious effects on local environments. Which of the following organisms was not introduced from outside the United States?
11. What is the main threat to biodiversity worldwide?
12. The number and relative frequency of genetic alleles of any one trait in a population is the population's:

Answer 1

Answer 1- Niche:- It is the match of a species to a specific environmental condition, usually seen as a response to distribution of resources and competition.

Answer 2- Mutualism :- In this both the partners benifit; the bacteria obtain nutrition from the host(human) while humans are aided in digestion and absorption.

Answer 3- Camouflage:- This is a physical adaptation which helps the prey to blend into its surrounding so as to avoid being detected by the predator.

Answer 4- Commensalism :- Example -

The relationship between cattle egret and grazing cattle, in which the egrets always forage close to where the cattle are grazing because the cattle, as they move, stir up and flush out insects from the vegetations otherwise difficult for the egrets to find and catch. This doesn't benefit the cattle in anyway.