Lake Victoria, shown in the population map above, is the largest lake in Africa

and is home to fish called cichlids (pronounced SIK-lids). In the 1950s, a new

fish, the Nile Perch, was introduced into Lake Victoria. This map shows the

change in the cichlid population since the Nile Perch was introduced.


Use the map above to answer the questions below.


1. Using a Key In which year was the number of cichlids the greatest?


2. Using a Key How many years did it take for the cichlid population to decrease

by 50 percent?


3. Inferring Relationships Which fish in Lake Victoria do you think is higher on

the food chain

the cichlid or the Nile Perch? Explain your answer.


4. Identifying Trends Based on the rate of decrease of cichlids shown on the map,

what do you think will happen to the cichlid population by 2050? Explain your

answer.

Answers

Answer 1
Don’t worry I’ll answer your questions ASAP

Related Questions

(SCIENCE) which of these statements about heating up water on earths surface is true? water heats up faster than land water heats up by conduction from Earth


PLEASE HELP!!!!

Answers

Answer:

Water heats up to a lower temperature than land.

Explanation:

Because water has a much higher heat capacity, or specific heat, than do sands, soils or other materials, for a given amount of solar irradiation , water temperature will increase less than land temperature.

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in an experiment describe photosynthesis​

Answers

it’s something about plants. sorry i know this isn’t areal answer i need points

Briefly summarize the structure of moss.

Answers

Mosses are ​bryophytes​, primitive plants believed to be among the first to develop the ability to live on land. Moss plants have no vascular tubes to transfer water or nutrients, and no true stems or roots. Environmental water sources and absorption limit moss plant size.

There may be as many as 15,000 species of mosses. Although unique species of moss grow in dramatically different habitats across the planet – from the arctic to the desert – all have basically the same structure.

Basic Moss Spores

The initial moss plant is a spore given off by the sporophyte that forms at the end of the moss plant’s “stem.” Released spores travel long distances on the wind and may remain viable for decades. Moss spores landing in suitable conditions divide and produce hairy filaments called ​protonemas​, which are like thin plant threads that weave across the growing medium. Sprouting from the spore filaments, gametophytes form, held to the surface by rhizoids.

Main Structure of Moss

The main moss structure is the ​gametophyte​, which functions like a moss’s “stem” and “leaves.” A moss "stem" is called the ​axis​, and this part of the moss supports leaf-like structures.

​Phyllids​ are the leaf-like structures that carry out photosynthesis, transforming sunlight into sugars the moss uses for food. Typically arranged in a spiral, moss “leaves” are usually one cell thick with ribs two or more cells thick down their centers. The cells of moss plants contain ​chlorophyll​, the green pigment that is essential for the process of photosynthesis.

Does moss have roots? No, not really. Moss stems end in root-like strands called ​rhizoids​, specialized to hold the moss to its growing surface. Rhizoids anchor moss plants to the surfaces they grow on, but they do not absorb water and nutrients like true plant roots.

Second-Generation Growth

The second moss structure is really a second generation. Moss reproduction occurs sexually, using separate plants produced at different times. The two separate kinds of moss plants are called ​gametophytes​ (which produce gametes) and ​sporophytes​ (which produce spores).

Gametophytes are tipped with either inverted cone-shaped areas (​archegonia​) or male reproductive organs (​antheridia​). Released sperm (​antherizoids​) need water since they swim to the archegonium. This is one of the main differences between bryophytes and vascular land plants – mosses need water for their sexual reproduction process.

Fertilization occurs once an antherizoid swims to an archegonium. Sprouting from the gametophyte tip after fertilization, a sporophyte holds itself in place by anchoring a foot in the archegonium.

Spore-Bearing Parts

The sporophyte stalk, called the ​seta​, bears the ​sporangium​ (spore capsule) on its tip. One sporangium may produce up to one million spores. Maturing spore capsules are guarded by a covering called the ​calyptra​ that shrivels and falls off when the spores are mature. The calyptra can be a distinguishing part of a moss species, and they are often useful in identifying new mosses.

A cap called the ​operculum​ tops the capsule's opening under the calyptra. The capsule opening (​peristome​) can have teeth that help hold it closed. Matured spores are released when the capsule top ruptures and drift off to form new plants. Like the calyptra, the operculum and peristome of some moss species are highly identifiable.

Mosses are small, non-vascular taxonomic plants

A typical leaf is composed of multiple layers of specialized cells. What is the correct order of layers starting on the upper surface of the leaf and progressing to the lower surface?

Answers

Answer: cuticle - epidermis - palisade mesophyll - spongy mesophyll- epidermis - cuticle

Explanation:

Are you for or against dna fingerprinting? Explain why

Answers

Answer:

For fingerprinting

Explanation:

In my opinion, I am for fingerprinting for DNA. Because if someone did a crime and left their fingerprint using DNA fingerprinting you will be able to figure out who did the crime. Which is very helpful in finding the criminal.

Again this is just my opinion. Note opinions may vary :)

What is common between these two pictures? Describe it in short. ​

Answers

Answer:

Eustachian Tube

Explanation:

Eustachian tube is the structure that connects the throat to middle ear. It performs an important role in the balancing of air pressure across the both sides and prevent from fluids building up in the ear.

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Hope this helped!

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The thing which is common between these two pictures is:

The Eustachian Tube


From the given image, we can see that there is image of ear and mouth and we can see that the outer ear is visible, while the mouth is wide open and we can see the interiors.

With this in mind, we can see that the Eustachian Tube is the structure which links the throat and ear and this performs the important function of regulating the air pressure that gets into the organs.

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differences between treatment outcomes for different populations are known as:

Answers

Answer:

Differences between treatment outcomes for different populations are known as health care disparities.

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Briefly summarize the structure of a fern

Answers

Answer:

The structure of a fern. Ferns have 3 major parts – the rhizome, the fronds and the reproductive structures called sporangia. ... An erect rhizome, which is a solid mass that gives rise to a tuft of fronds. You can see this type of rhizome on a king fern or a crown fern.

Explanation:

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Black eyes (B) are dominant to red eyes (b) in mice. Use a Punnett square to cross two heterozygous parents. What are the possible genotypes?
A. bb
B. BB and Bb
C. BB, Bb, and bb
D. Bb and bb

Answers

C.- BB, Bb, bb
if you need a visual i attached a pic

Scientists put a sample of water into a sealed tank. Water can be a solid, liquid, or gas. At first, the water was a liquid. Then, the scientists transferred energy out of the substance, and the water changed phase. What happened to the movement of the water molecules?

After the phase change, the water molecules moved . . .

Answers

Answer:

slower and started moving in place

Explanation:

Compound use by cells to store and release energy

Answers

Answer:

Adenosine triphosphate (ATP) is a chemical compound cells use to store and release energy. An ATP molecule consists of adenine, the sugar ribose, and three phosphate groups.

if retinal detachment occurs in the macula or fovea, one can predict that there would be a significant loss of ______.

Answers

Answer:

color vision

Explanation:

What are some similarities and differences between an angiosperm and a gymnosperm? PLEASE

Answers

Answer:

Here are some similarities and differences

Explanation:

Both are more highly evolved than nonvascular plants, both are vascular plants with vascular tissue that live on land and reproduce by making seeds, both are classified as eukaryotes

Only angiosperms are known as flowering plants, many have blossoms and fruits that contain seeds and the typically drop their leaves when the seasons change their leaves are flat and are seasonal in their life cycle

Gymnosperms produce uncovered seeds, most have green needle-like leaf structures, they are generally evergreen

Spindle fibers begin to form.

Answers

Answer: Yes that is true but you gave basically NO information at all.

Explanation:

Answer:

yes that that that that Tish that that

What is secondary endosymbiosis?
A. a eukaryote envelops another eukaryote
B. a prokaryote preys upon a prokaryote
C. a prokaryote engulfs a eukaryote
D. a eukaryote overtakes a prokaryote

Answers

Answer:

Secondary endosymbiosis is when a living cell engulfs another eukaryote cell that has already undergone primary endosymbiosis. It has happened often enough that it has led to genetic diversity among the organisms on Earth.

Explanation:

hope this helps I don't know Its correct answer

this is about environmental systems ​

Answers

Answer:

A. A weak or strong current

Explanation:

D. is inccorect because rivers are always freshwater

C. is incorrect because seawater is salt water

B. is incorrect because rivers have waterflow.

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Que derivados del petróleo se utilizan en la fabricación de materiales deportivos?

Answers

Answer:

Explanation:

*Which statement best explains the main conflict and resolution in "How a Cat Played Robinson Crusoe"?

The cat is abandoned on an island. She adapts to the wilderness and survives until her family returns.

The family worries about the cat. They are overjoyed to discover that the cat is alive when they return.

The cat faces many adversaries, including rats and owls. However, she persists and is able to overcome each.

The cat learns how to hunt. She does not starve to death on the island.

A(n) _______________ is a small box with a glass lid that catches the heat of the Sun. It is coated with black metal to absorb the heat and insulated to keep heat from escaping.

solar battery
solar cell
solar grill
solar oven

Answers

Answer:

Well, its a solar cooker but the anwser is solar oven

Explanation:

help taking final will give the breian thing

Answers

what is your question? i cant download it

what is the first part of the small intestine called?

Answers

Answer:

The first part of the small intestine is called duodenum

Explanation:

The small intestine is a tightly folded tube which connects to the stomach on the top end and to the large intestine on the bottom end.

The small intestine consists of three parts:

duodenumjejunum (absorbs sugars, amino acids, and fatty acids)ileum (absorbs remaining nutrients that did not get absorbed by the duodenum or jejunum)

Duodenum is responsible for completing the first phase of digestion. In this section of the intestine, food is mixed with enzymes and bile which help break down food.

Answer:

Duodenum

Explanation:

Duodenum is the first part where most of the small intestine digestion happens

What distinguishes an acute disease from a chronic disease?

What is the difference between them

Answers

Answer:

Acute illnesses generally develop suddenly and last a short time, often only a few days or weeks. Chronic conditions develop slowly and may worsen over an extended period of time—months to years.

Acute diseases refer to the medical condition that occurs suddenly and lasts for a shorter period of time. Chronic diseases develop slowly in our body and may last for a lifetime. Chronic diseases are sometimes fatal.

Explanation:

An acute disease lasts for a very short period of time while a chronic disease lasts for a very long time, even the whole lifetime.Acute diseases do not have much bad effects on our health but chronic diseases have bad effects on our health which will ultimately lead to poor health conditions.A person suffering from acute disease does not have fatigue, loss of weight, etc. While a person suffering from chronic disease has fatigue, weight loss, loss of appetite, etc.Examples of acute diseases are common cold, influenza, etc. Chronic disease examples are diabetes, cancer, etc.

Hope you could understand.

If you have any doubt, feel free to ask.

Which feature is characteristic of rivers?​

Answers

Answer:

A. a weak or strong current

Explanation:

hope this helps

Answer:a weak or a strong current

Explanation:

what are the different variations of genes called?

Answers

Answer: Different versions of a gene are called alleles.

What are three characteristics of alveolus? <3

Answers

1.They give the lungs a really big surface area.

2.They have moist, thin walls (just one cell thick)

3.They have a lot of tiny blood vessels called capillaries.

if one cell undergoes mitotic division every 3 minutes and 18 minutes pass, how many cells will have been created?

Answers

Answer:

6

Explanation:

if there is one cell that is being created every 3 mins, then you would divide 18 by 3 and get 6.

Answer:

here look at this it might help you

Explanation:

heat moves through the atmosphere through the process of ?

Answers

The answer is Conduction

Answer:

Heat moves through the atmosphere through the process of Conduction.

Explanation:

Conduction, radiation and convection all play a role in moving heat between Earth's surface and the atmosphere. Since air is a poor conductor, most energy transfer by conduction occurs right near Earth's surface.

Identify two specific populations that most likely increased in number after the mountain lion population decreased. Explain why.

Answers

Any change that occurs at any link of a trophic web will affect the other links. The two specific populations that most likely increased in number after the mountain lion population decreased are rabbits and deers.  

----------------------------

The trophic web is a relationship process between different organisms, through which occurs transference of energy. The ones placed at lower levels pass energy to the ones at the higher levels.

Organisms at each level feed on the preceding one and become food for the next one.

The first link corresponds to a producer organism -autotroph-.  

The following links are the consumers -heterotrophs-: herbivores and carnivores.

The last links are the decomposers that degrade organic matter from dead organisms.  

As it is a web, all organisms are equilibrated until a change occurs.

When the change affects any of the involved links, there can be a cascade effect on the web.

A change in a link population size (increasing or decreasing) will affect the superior links and the immediately anterior link.

Also, when two or more species are competing for the same source of food, a change in any of the population sizes will affect the other ones.

According to the provided trophic web, puma feeds on deer and rabbit.

Since puma was killed, their population size sharply decreased.

This fact followed the predator-prey cycle, in which the predator regulates the prey population size and vice-versa. When there is a decrease in the predator population size, the prey population increases in size because of the absence of their natural predators.

In the absence of puma, deer and rabbits increase their population size. They live in an environment with no predators and enough resources.

The number of individuals of each species increased, and the amount of food consumed increased too.

This change negatively affected grasses and grains, which were over-consumed. Also, crickets and mice were affected too because they compete for the same food source.

So, cascade effects would be as follows,

1) The decreased in the puma population size caused an increase in the deer and rabbit population size.

2) The increase in the deer and rabbit population size caused a decrease in the grains and grasses species population, because they were over consumed.

3) The decrease in grains and grasses caused a decrease in the cricket and mouse population, because they feed on the first ones, competing with deer and  rabbits for food.

The two specific populations that most likely increased in number after the mountain lion population decreased are rabbits and deers.  

------------------------

You can learn more about trophic webs at

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What is the metabolic process that breaks down organic molecules to release energy to be used by cells?
A. cellular respiration
B. light dependent cycle
C. light independent cycle
D. photosynthesis​

Answers

Cellular respiration

Cellular respiration in living tissues is reduced at low temperatures. The amount of kinetic energy needed for chemical reactions like cellular respiration to occur decreases as temperature rises.  Thus, option A is correct.

What importance of cellular respiration in an organism?

As oxygen tension dropped, so did breathing rate, which eventually reached nil at low oxygen tensions.

Cell density had no bearing on this outcome. We provide a model to explain the observed impact of oxygen tension on cellular oxygen uptake.

As a result, increased cellular respiration is often associated with warmer temperatures.

Carbon dioxide concentration: The rate of respiration is inversely correlated with carbon dioxide concentration.

Increased carbon dioxide levels and a lack of oxygen have a negative impact on aerobic respiration rate.

Therefore, cellular respiration  is the metabolic process that breaks down organic molecules to release energy to be used by cells.

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What processes are responsible for the formation of copper ?

Answers

Answer:

The high temperatures of volcanic magma creates hydrothermal veins, allowing some of the heat to escape near the upper layers of the Earth's crust. This is why copper is often found in the sedimentary layer, where sand and mud are compressed until they form a layer of sedimentary rock on the surface of the earth

Explanation:

1) compare all three states of matter to the
right. Which square has the greatest density
and why? And why is it correct?

Answers

Answer:

A

Explanation:

it has more matter in given area, so it is denser.

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