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I was assigned this AP biology summer assignment, and i did all of the problems i could and here are some of the problems that i cannot find the answers for, and i would greatly appreciate it if someone would take their time out to help me with this. If your not 100% sure of the answer, just tell me your best guess. “note: that is if you know what your talking about and knowledgeable in this subject”
7.) Ecologists surveying the tree species in two forest plots of different ages. Plot 1 has six different species and 95% of all trees belong to just one species. Plot 2 has five different species, each of which is represented by approximately 20% of the trees. How would you describe plot 2 as compared with plot1?
a) Higher species richness
b) Greater species diversity
c) Lower relative abundance
d) Lower species richness
e) Both b and d are correct
Correct answer:
10.) invasive species often reach a large biomass because
a) They are better competitors than native species
b) They are usually producers and are not top predators.
c) They often lack natural predators or pathogens.
d) Their superior ability to disperse enables them to spread to new niche
e) They are often protected by the humans who have introduced them
Correct answer:
11.) why do most food chains consist of only three to five links?
a) There are only five trophic levels: Producers; primary, secondary, and tertiary consumers; and decomposers.
b) Most communities are controlled bottom-up by mineral nutrient supply
c) The dominant species in most communities consumes the majority of prey; thus, not enough food is left to support higher predators.
d) Acoording to the energetic hypothesis, the inefficiency of energy transfer from one trophic level to the next limits the number of links can exist.
e) According to the trophic cascade model, increasing the biomass of the top trophic levels causes a decrease in the biomass of lower levels, so that the top levels can no longer be supported
Correct answer:
16.) A major explanation for the decline in species richness along an equatorial-polar gradient is the correlation of high levels of solar radiation and water availability with biodiversity. Which of the following is also suggest as a factor in the high species richness of tropical communities?
a) The inverse relationship between biodiversity and evapotranspiration
b) The greater age of these communities (longer growing season and fewer climatic setbacks), providing more time for speciation events
c) The larger area of the tropics and corresponding richness predicted by the species-area curve
d) The lack of disturbances in tropical areas
e) The greater immigration rate and lower extinction rate found on large tropical islands
Correct answer:
18.) Which of the following best describes a zoonotic pathogen?
a) A pathogen that affects insects
b) A pathogen that requires a vector to spread from animal to animal
c) A disease-causing agent that is transmitted to humans from other animals
d) A pathogen that is found in zoos due to the unnatural habitat provided for animals
e) An ectoparasite that is transferred from animals to humans
Correct answer:
I would greatly appreciate it if someone is able to answer any of these questions.above
Also i would greatly appreciate it if someone who knows alot about this subject could tell me if I got these questions below answered right and if not what the correct answer should be.
4.) aposematic coloring is most commonly found in
a) Prey whose body morphology is cryptic
b) Predators who are able to sequester toxic plant compounds in their bodies
c) Prey species that have chemical defenses
d) Good tasting prey that evolve to look like each other
e) Plants that have toxic secondary compounds
Correct answer: E
5.) through resource partitioning
a) Two species can compete for the same prey item
b) Slight variations in niche allow closely related species to coexist in the same habitat
c) Two species can share identical niches in a habitat
d) Competitive exclusion results in the success of the superior species
e) Two species with identical niches do not share the same habitat and thus avoid competition.
Correct answer: B
8.) a palatable (good tasting) prey species may defend against predation by
a) Mullerian mimicry
b) Batesian mimicry
c) Secondary compounds
d) Aposematic coloration
e) Either a or b
Correct answer: D
9.) when one species was removed from a tidepool, the species richness became significantly reduced. The removed species was probably
a) A strong competitor
b) A potent parasite
c) A resource partitioner
d) A keystone species
e) The species with the highest abundance rate
Correct answer: E
Thank you all who take your time out to help me i greatly appreciate it

the answers to any of these questions would really help thanks 🙂
what are the names of some lichen in a kelp forest?
what are some examples of tropism in a kelp forest?
what is a specific niche in a kelp forest?
what is a general niche in a kelp forest?
what are some efforts to sustain biodiversity in a kelp forest?

i dont know why and i need help

Island___Area____Species___Extinction (FIGURE 2-4)
A_____850,000____175______25
B_____300,000____140______35
C______90,000_____80______50
2). According to the data in Figure 2-4, the _____ has the greatest impact on species loss
A. Original number of species
B. Distance from the Mainland
C. Area of the island
D. Climate
3). Predict what the approximate species loss would be on an island that is 500,00 km2 in size using the figure 2-4
A. Less then 25
B. Between 25 and 35
C. Between 35 and 50
D. More then 50
4). Condsider the following paris of organisms: large predators and small predators: large herbivores and small herbivores: and migratory animals and non-migratory animals. The two animals most likely to suffer the most from habitat fragmentation are the:
A. Larege predators and migratory animals.
B. Large herbivores and large predators.
C. Non-migratory animals and small herbivores
D. Migratory animals and large herbivores.
5). Island A has and area of 30 square kilometers. Island B has an area of 400 square kilometers. The islands are near each other. which of the following statements is most likely to be true?
A. Island A has greater biodiversity and higher percentage of edge effect then Island B
B. Island A has less biodiversity and a higher percentage of edge effect then Island B
C. Island A has greater biodiversity and a lower percentage of edge effect then Island B
D. Island A has less biodiversity and a lower percentae of edge efften the island B
6). For many years orchid collectors searched Exotic IIands for beautiful Kimmarie Orchid, which is found no place else in the world. After they found the orchid, they brought it back to their homes. In the past couple of years the Kimmarie Orchid has not been found on the island. As a result, hobbyists are now sending The Kimmarie Orchid to be replanted on the island.. The Kimmarie Orchid became extinct in the wild beacuse of:
A. Overcollection
B. Habitat loss
C. Exotics
D. Habitat degradtion
7). Population control factors whose effects increase as the size of the population increases are:
A. Abiotic factors.
B. Density-dependent factors
C. Limiting factors
D. Density-independent factors
8) The statement “proportions of a population expressed in terms of the reproductive years of the individual orgnisms,” refers to the population’s
A. Fertility rate
B. Reproductive strategy
C. Age structure
D. Carrying capacity
9). Starfish live in saltwater ecosystems. Some species live in shallow tidal pools, while others live in the deepest part of the ocean. This is a decription of the ___ of the starfish
A. Community
B. Habitat
C. Niche
D. Trophic level
10). Ling feeds her guppies one-half teaspoon of fish food every day. The average guppy population in her aquarium over a four-month period is 38 guppies. She increased the food to one teaspoon per day. After a four- month period, the average population is 53 guppies…… Which of the following statements is supported by these facts?
A. The size of the aquarium was a limiting factor
B. One-half teaspoon of food was a limiting factor
C. As long as Ling keeps adding more food, the guppy population will continue to grow
D. Guppies reproduce rapidly

Im a bit confused about these questions and would very much appreciate it if you could help me out a little bit please?
Thanks!
1. Succession
In 1908, a meteoroid or cometary body exploded above boreal forest of Tunguska in central Siberia, resulting in the largest impact event over land in Earth’s recent history. How might succession have differed after this event compared to a forest fire in terms of succession type and the timescale of reaching a climax community?
2. Niche
A realized niche describes the niche occupied by an organism in the presence of other competing species.
True/False
3. Genetic variability & evolution
(a) Why does evolution require the presence of genetic variability?
(b) Why is genetic variability not sufficient for evolution (i.e. what else is needed for evolution to occur)?
4. Convergent evolution
Convergent evolution can be found when two separate and distinct species evolve similar traits as a result of adaptation to selective pressures from similar environment. Find an example (not mentioned during class) of two species that followed convergent evolution. Justify your answer giving the name of both ancestor species and why you consider they are a good example of convergent evolution.
5. threats to biodiversity
(AM) What are the 4 of the most important threats to biodiversity? List them in descending order of importance.

a. ecosystem
b. population
c. community
d. habitat
Which of the following statements about evidence is not true?
a. Police may walk through a crime scene searching for evidence
b. All evidence should be photographed
c. All evidence must be documented
d. All evidence must be taken to a crime lab to be analyzed
physcial location : habitat ::
a. function : niche
b. biodivesity : community
c. trophic level : food zone
d. consumers : trophic level