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A preservation biologist conducted an experiment on two islands (A and B) of similar size, climate, species composition, and richness. Originally, a large population of the same invasive species, a brown tree snake, was present on both islands. It had led to the extinction of some native lizards and forest birds. In her experiment, the biologist removed the brown tree snake from island B but not from island A. She then recorded the number of animal species on each island over a period of 24 months. The data collected is shown in the graph below:

Analyze the data above in terms of interspecific relationships and communities. Which statement best explains the difference in species present on each island over the course of the experiment?

The scientist is the ecosystem engineer of island B.
The brown tree snake was a keystone species on island B.
The brown tree snake is a foundation species on island A.
The brown tree snake is the ecosystem engineer on island A.

Boiga irregularis or brown snake is a slender, climbing snake with a vertical pupil and large eyes, providing it better nocturnal vision. The species has no natural predator. When the brown snake is accidentally released into the island, it will result in local extinction of the majority of the island's native lizard and bird species.

It will also result in cascading ecological influences by eradicating native pollinators, resulting in the corresponding reduction of the native plant species.

Hence, the correct answer will be fewer birds and more snakes.

Ecosystemic engineers might affect the ecosystem structure and community dynamics. Option D. The brown tree snake is the ecosystem engineer on island A.

Ecosystemic engineers are organisms that can modify the environment in which they live, influencing other species by changing biotic and abiotic factors and affecting resources availability.

Usually, the interaction of ecosystemic engineers with other species has a consequence on the ecosystem structure and equilibrium.

Based on this concept, many invasive species are considered ecosystemic engineers.

Invasive species are uncontrollable and provoke significant damage to the structure of native ecosystems, affecting endemic species. They produce ecological imbalances in the trophic chains and the dynamics of communities.

By affecting the structure of native ecosystems, they produce cascade effects in resident biota, altering the composition and habits of species in the region and modifying physical and chemical conditions in the environment.

The statement that best explains the difference in species present on each island over the course of the experiment is that The brown tree snake is the ecosystem engineer on island A. Option D.

As we can see, in the presence of the brown tree snake, many species suffered extinction on island A, probably by both direct and indirect effects of the invasive snake.

Island B, on the other hand, kept plenty of species diversity. This is because the snake was removed from the island. Native species managed to increase their population size and to establish again.

You will learn more about ecosystem engineers at

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Which of the following would have the GREATEST effect on reducing the effects of
climate change??

Carpooling to work

Recycling

Biking to work

Switching to renewable energy sources such as wind and solar

How does energy transfer from the hot water to the cold air

What is the primary cause of groundwater shortage?
A)
pollution
B)
use exceeding the rate of replenishment
C)
lack of precipitation
D)
flooding

As sound waves travel through air, they cause air molecules to do what?

I REALLY NEED HELP ASAP!!!!!!!

*I attached a picture but heres the question just in case!"

"The diagram below shows the structures of an animal cell. What is structure 3, and how does it help sustain life?"

Given that cellular respiration uses oxygen and produces carbon dioxide which of the following statements can be inferred from the diagram shown above? Animals participate in cellular respirationwhile plants participate in both cellular respiration and photosynthesis OB. Animals participate in cellular respiration , while plants do not OC Animals do not rely on plants for survival D. Animals participate in cellular respiration because it results in the same products as photosynthesis

HELP! This is a fill in the blank I need a quick answer to.

Cells can make new cells. One cell can (a) ____________ into two new cells. This is called (b)__________________. The process of cell division goes through various states. First, the cell nucleus (c)________________ into two. A new cell surface membrane then (d)____________ the cell divides. The two new cells are called (e)_______________ and they are small. They will grow and become larger. They grow by getting (f)______________ from the food that is eaten. Once they grow to full size they can also (g)_____________. If cells divide more quickly than they should, or divide in the wrong way, (h)_____________ can develop.

Which statement best explains how respiration and photosynthesis are related to one another?
A Respiration requires water that is given off during photosynthesis.
B. Photosynthesis requires oxygen that is given off during respiration.
C. Photosynthesis gives off carbon dioxide that is required for respiration
D. Respiration gives off carbon dioxide that is required for photosynthesis

The opening in leaves necessary for photosynthesis is call the

The giant panda has six fingers on its paws instead of five, and its favorite food is
bamboo. How does this adaptation help the panda to survive?
O It allows the panda to digest the bamboo faster.
It allows the panda to reach the taller bamboo stalks.
It helps the panda climb the bamboo stalks more quickly.
It helps the panda hold large bamboo stalks as it feeds.

why should we conserve ecosystem?​

Complete the table below showing the sequences of DNA, mRNA codons, tRNA anticodons and the amino acids. Remember the genetic code is based on mRNA codons. (il give you brain list if you answer all)

which came first the chicken or the egg (this is for a school asignment i promise)

What do you wonder about the inheritance of traits in complex organisms?

Which of the following describes the function of genomics and marker-assisted selection?
A. help determine the heritability of a trait and eliminate undesirable traits
B. introduce probiotics and the transfer of microorganisms from other species
C. eliminate undesirable traits and improve desirable traits
D. improve desirable traits and help determine the heritability of a trait

All forms of life work and must take in food to create_______?

An informational pamphlet in a health clinic describes an interaction between body systems.
5
An ovum moves from an ovary into the
uterine tube where its migration toward
the uterus is aided by the peristaltic
contractions of the smooth tissues of the
uterine tube's walls
6
7
Which statement identifies the body systems that are directly involved in the interaction
described and explains how they accomplish the interaction?
00
A The nervous system produces hormones that stimulate the ovum, and the circulatory
system moves the ovum into the uterine tube.
9
B The circulatory system supplies the uterine wall with oxygenated blood, and the
immune system prevents damage to the ovum. -
C The reproductive system produces the ovum, and the muscular system causes the
migration of the ovum by peristaltic contractions.
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D The excretory system expels the ovum from the ovary, and the nervous system causes
the contractions of the smooth tissues of the uterine wall.

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What is one result of meiosis?


A. two diploid cells


B. four diploid cells


C. two haploid cells


D. four haploid cells

12
1 point
Which type of cell must contain a mutation in order for the mutation to be passed on to offspring (select 2)?
sperm cell
egg cell
skin cell
nerve cell
brain cell
blood cell

Provide a possible explanation for the
increase in size and weight of the elephants over millions of years.

Please Help!!!! Will mark brainlest.

Provide an example of how your body could maintain homeostasis in response to detecting that the body temperature was falling below 98.5 degrees.

What controls cell differentiation within
organisms?

Which of the following is an example of microevolution?
A. The formation of four new species of fish in a lake over thousands of years
B. A mass extinction that occurs because of major environmental changes in a habitat
C. A change in the frequency of body color in species of beetle over time
D. The formation of two new species of rodent that have been isolated by a mountain range

where can you get information about endangered species?​

In a eukaryotic cell, which of the following processes directly involves DNA?

Which parts of photosynthesis occur in the thylakoid membranes of the grana? Check all that apply.

The Sun’s energy is captured.

Carbon dioxide is used to build sugars.

Oxygen is produced.

Energy is transferred to ATP.

A land based global community of organisms is called a?

during what stage do you have sleepwalking and sleep talking?

Archaebacteria and eubacteria are classified into different kingdoms, but at one time they were both classified in the Kingdom Monera. Which statement best describes why the classification of these organisms was changed?

A. The kingdom became too large and had to be made into two smaller kingdoms.
B. New biochemical data showed different evolutionary relationships within the kingdom
C. The archeabacteria and eubacteria habitats were too different to be classified in the same kingdom.
D. Chromosomal analyses indicated a new genetic combination had arisen within a certain organisms in the kingdom.