Several scientists travel to a remote coast to study the biodiversity of the area. How could the scientists calculate the species richness of the ecosystem?
A. counting the total number of different species
B. calculating the number of organisms in each trophic level
C. counting the total number of individual organisms
D. calculating the number of producers in the area
Answers
Answer:
A. counting the total number of different species
Explanation:
The only way to calculate the species richness in the ecosystem is counting the total number of different species. This is basically what species richness is, therefore it would be the best way to calculate it. Species Richness does not require that the scientists take into account the population of each species instead, each unique species found is counted as 1 towards the calculation of species richness.
Answer:
from khan academy :)
Related Questions
What is the source of carbon in a glucose molecule
produced by photosynthesis?
a. CO2
b. Light energy
c. H20
d. glucose
Answers
HELP ME
this is a K12 question
The weather is warm and dry.
Which change would a cold front bring?
rain or thunderstorms
extended period of rain or snow
dry air and sunny skies
several days of gray skies
Answers
Answer:
rain or thunderstorms
Explanation:
Answer: It brings rain or thunderstorms.
Hope this helps!
1. What shellfish have segmented bodies?
Answers
crustaceans have segmented bodies
Answer:
Lobster,Shrimp and Crab have segmented bodies to protect their muscles and organs that gives them structural support.
Explanation:
Which characteristics do birds and mammals share? Check all that apply.
A. Both give birth to live young.
B. Both are endotherms.
C. Both have hair or fur.
D. Both produce milk to feed their young.
E. Both are vertebrates.
Answers
Answer:
B and E
Explanation:
The correct answer would be that both birds and mammals are vertebrates and are also endothermic.
Both birds and mammals belong to the same animal kingdom. They also belong to the same chordate phylum but belongs to different classes under the phylum. However, they both belong to the same sub-phylum Vertebrata - a group of chordates with the vertebral column.
Birds (aves) and mammals represent different classes of animals. Birds lay eggs that later hatch when conditions are right to give rise to their young ones. Mammals, on the other hand, give birth to their younger ones and are able to produce milk through their mammary gland to feed them. The body of mammals is characterized by the presence of hairs that help insulate the body making them to be homoiothermic, unlike birds that of birds, where hair is replaced with feathers.
However, both birds and mammals are endothermic, that is, they both maintain a fairly constant body temperature irrespective of the temperature of their environment.
The correct options are B and E.
Both are endotherms and vertebrates. Therefore option B and E is correct.
Birds and mammals share the characteristics of being endotherms and vertebrates.
Endotherms are animals capable of regulating their body temperature internally, which allows them to maintain a relatively constant body temperature even in changing environmental conditions.
Both birds and mammals are warm-blooded, which enables them to be active and maintain their metabolism efficiently.
Additionally, birds and mammals are vertebrates, meaning they possess a backbone or vertebral column. This structural feature provides support and protection for the spinal cord and allows for efficient movement.
While birds and mammals have other unique characteristics, their endothermic nature and vertebrate status are significant similarities that contribute to their adaptability and success in diverse ecosystems.
Therefore option B and E is correct.
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What are five similarities and five differences between sharks and bony fishes?
Answers
[tex]\Huge\text{Pisces or Fishes}[/tex]
Pisces or Class Fish is the largest group of chordates which includes 25000 species of fishes. Study of fishes is called Ichthyology.
Fish is an aquatic gill breathing gnathostomates whose stramlined body is provided with paired fins and covered over dermal scales.
Super Class pisces is divided into two classes:
Chondrichthyes Osteichthyes _____________________________________
[tex]\Huge\textbf{Chondrichthyes}[/tex]
Chondrichthyes are Cartilagineous fishes. This class is also called Elasmobronchi. It has exclusively marine fishes with endoskeleton made of cartilage. Their skin has tiny shark enamel coated denticles called Placoid Scales. They are heterocercal and Mouth is present at ventral to tail fins. They have exposed 5 gills on each sides.
Example Shark, Ray fishes, Dog dish etc
_____________________________________[tex]\Huge\textbf{Osteichthyes}[/tex]
These fishes are Bony Fishes. This group is also called Teleostomi, They are found in both marine and fresh water. Their endoskeleton is made up of bones. Their skin has thin bony plates called cycloid or ctenoid. Their gills are covered with outer skin called operculum. Tain fin is homocercal and mouth is present at anterior tip.
Examples Sea Horse, Gold fish, Eel etc
_____________________________________[tex]\huge\text{Similarities}[/tex]They have gill to breath Streamlined body to move in fast moving water All fishes are cold-blooded. Fins are present for locomotion They have great sense of smell They have air bladder to be bouncy[tex]\Huge\text{Dissimilarities}[/tex]
Chondrichthyes are exclusively marine fishes while Osteichthyes are both fresh water and marine water living.The skeleton of Chondrichthyes is made of cartilage while the skeleton of Osteichthyes is made of bones.The gills of Chondrichthyes is NOT covered with operculum while the gills of Osteichthyes are covered with outer skin operculum. The skin of Chondrichthyes has tiny shark enamel coated denticles called Placoid Scales while the skin of Osteichthyes has thin bony plates called cycloid or ctenoid.The tail of Chondrichthyes is Heterocercal and mouth is ventral to the tail fins while the tail of Osteichthyes is homocercal and the mouth is present at anterior tip._____________________________________Best Regards,'Borz' A young man recently learned from a genetics doctor that he had a condition called Friedreich's ataxia. This syndrome affects the arms and the legs with the person usually needing a wheel chair. Neither of his parents have this disorder. However the young man's grandfather was wheelchair bound, but didn't know why because genetic information was very limited when his grandfather grew up.
What are the genotypes of each of the individuals mentioned in this question? Create a pedigree chart to support your answer.
Answers
Answer:
i believe dominant genotypes
Explanation:
from memory sorry for no pedigree chart
Earth’s temperatures are stable because we are surrounded by ________ which allows the right amount of sunlight in to warm the Earth. *
Answers
Answer:
Atmosphere
Explanation:
Energy from the sun provides energy for all the organims in an ecosystem.
Answers
Answer:
The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. This establishes the beginning of energy flow through almost all food webs.
Body cells are identical to one another. How do these cells reproduce?
O
A. through gamete formation
O
B. through genetic mutation
O
C. through meiosis
D. through mitosis
Answers
Answer:
The answer is D, Mitosis.
Explanation:
Mitosis: a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth. This also explains why your body cells are identical to each other.
In eukaryotic cells, DNA is packaged with proteins into structures called
chromosomes. What advantage do chromosomes provide the cell?
a. They ensure equal division of genetic material when a cell divides.
b. They allow random distribution of genetic material when a cell divides.
c. They allow all genes to be expressed at the same time.
d. They eliminate the need for a nuclear membrane.
Answers
Answer:
A
Explanation:
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Answers
Answer:c
Explanation:
explanation
HELLLLLPPP PLANT STRUCTURES LAB REPORT DOES ANYONE HAVE ANSWERRS 100pts
Answers
Answer:
hey Rebecka the answer is in the photos. thank me later, also you should cut me some cucumbers
Explanation:
Plant cells are different from the animal cells in their basic structure such as the cell wall which is absent in the animal cell, chloroplast is also found in the plant cell which is not present in animal cell.
What are Plant cells?Plant cells have a rigid cell wall, a large central vacuole, and plastids such as chloroplasts. The cell wall is a layer which is present outside the cell membrane and surrounds the cell, it provides the structural support and protection.
The central vacuole is present in the plant cell and it maintains turgor pressure against the cell wall. The central vacuole is a large vacuole found inside of plant cells. It is a sphere which is filled with fluid and molecules inside a cell. The central vacuole stores water.
Chloroplasts are the organelles which are responsible for the process of photosynthesis, are in many respects similar to mitochondria. Both the organelles including chloroplasts and mitochondria function to generate metabolic energy, evolved by endosymbiosis, and also contain their own genetic systems, and replicate by division.
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Your question is incomplete, most probably the complete question is:
Learn and recognize the basic structures of a plant cell.
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20 POINTS
Three chairs were rolling across a flat office floor. The blue and red chairs are the same mass, and they have more mass than the yellow chair. Each chair was hit by another chair, but not from the same direction. Use the information in the diagram to answer.
Answers
Answer:
The answer is A
Answer:
answer is A hope it helps
If I have 8 DNA nucleotides, how many
DNA
bases do I have?
How many base pairs?
Answers
Answer:
Each nucleotide contains phosphate, sugar (of the deoxyribose type), and one of the four bases (Figure 8-4). When the phosphate group is not present, the base and the deoxyribose form a nucleoside rather than a nucleotide. The four bases are adenine, guanine, cytosine, and thymine.
Explanation:
why do you think places along the equator have relatively constant temperatures and daylight hours all year?
Answers
Answer:
Explanation:
The Earth's axis tilts approximately 23.5° from vertical relative to the plane of the Earth's orbit around the sun. ... The equator, however, receives relatively consistent sunlight all year. The consistency of energy means the equator's temperature stays relatively constant all year.
list different causes of diseases
Answers
Answer:
Bacteria. These one-cell organisms are responsible for illnesses such as strep throat, urinary tract infections and tuberculosis.
Viruses. Even smaller than bacteria, viruses cause a multitude of diseases ranging from the common cold to AIDS.
Fungi. Many skin diseases, such as ringworm and athlete's foot, are caused by fungi. Other types of fungi can infect your lungs or nervous system.
Parasites. Malaria is caused by a tiny parasite that is transmitted by a mosquito bite. Other parasites may be transmitted to humans from animal feces.
Explanation:
i write it with the explanation on when i answer it
hello! I had one quick question I wanted to ask just to make sure I was right. the question is "How do animals obtain the energy they need? "
Answers
Answer:
by eating or doing whatever that species needs to do
Explanation:
(2.92 +6) + (5.12 + 8)
|
Answers
Answer:
22.04
Explanation:
Name the floral parts which help in
Sexual reproduction of plants.
Answers
Answer:
Gynoecium
Explanation:
The male organ of a flower is called stamen. It helps in making male gametes of the plant and is present in pollen grains. The female organ of a flower is called carpel. It helps in making female gametes or egg cells of the plant and is present in ovules.
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ACTIVITY
Which of these is an opinion?
A
Scientists sent the new lichen to Oregon State University.
B
Yosemite National Park is in California.
С
Scientists will probably find more new lichen in Yosemite.
Lichen are made up of fungi and algae.
Answers
The Tower of David is in the Old City of Jerusalem. Visitors at the tower noticed that the wind suddenly shifted direction early this afternoon.
is it weather or climate
Answers
Answer:
This atmospheric condition represents weather.
Explanation:
Weather can be defined as the atmospheric conditions of a particular area over a short period of time. Some of the elements of weather are wind, humidity, temperature, air pressure, precipitation and clouds.
Basically, the weather of a particular area or region may change hourly, daily, monthly or even annually.
In this scenario, the Tower of David is in the Old City of Jerusalem. Visitors at the tower noticed that the wind suddenly shifted direction early this afternoon. Therefore, this change in the atmospheric condition (wind) represents weather.
On the other hand, climate refers to the change in the atmospheric conditions and manifestation of weather in a particular area over a long period of time usually 30 years.
I NEED HELP
What animal adaption happened before the others? a.pex
A) Reproduction on land
B) Development of a coelom
C) Tissue development
D) Deuterostome development
Answers
Answer:
C tissue development
Explanation: tissue development is what happens before others
Question: In an area where a river has cut deep into Earth, there are several layers of very different rock exposed. The oldest rock layer is most likely to be the layer that is A Below the other layers. B The thickest layer. C The most rich in fossils. D Igneous intrusive rock.
Answers
Answer:
C
Explanation:
The oldest rock layer is most likely to be the layer that is The most rich in fossils.
What are types of rock layers ?
A rock layer is defined as the formation of the aggregation of different mineral constituents in the earth’s crust and the classification of rocks layer is based on different factors such as Geological classification, Physical classification, Chemical classification.
Geological classification of rock layer include Sedimentary rock formed by the sediments deposition by the weathering of pre-existing rocks and the sediments can be spread by different agents like water, wind, frost, gravity, etc. Examples are Sandstone, limestone, lignite, etc.
Igneous rocks formed by solidification of magma below the earth’s surface, unable to descend, these magma cools down and solidifies into igneous rocks.
Metamorphic rocks formed by the metamorphism process where the f the pre-existing rocks is changed by the influence of heat and pressure, for example Slate, Gneiss, Schist, marble, soapstone etc.
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Why is it necessary for the cell to grow and duplicate its DNA before the start of meiosis?
Answers
Answer:
Cells will duplicate or copy their DNA right before they divide. The process of cell division is called mitosis. Since the cell is dividing it needs two copies of its DNA - one is kept by the parent cell and the other is passed to the daughter cell. ... So this process of duplicating DNA is very important.
how much force is needed to make a 12 kg object accelerate at 3 m/s
Answers
concentration.
a. The video clip explains that you can also look at water as moving to a
concentration of solute molecules.
b. Why can it also be viewed this way?
Answers
Answer:
A. The video clip explains that you can also look at water as moving to a HIGHER concentration of salute molecules.
B. Why can it also be viewed this way?
Because there is more salute and less water.
How do proteins and amino acids affect how we think and behave?
Answers
Answer:
proteins and amino acids, the building block nutrients of growth and development, manipulate how we feel and behave. Amino acids contain the precursors to neurotransmitters, the chemical messengers that carry signals between neurons, affecting things like mood, sleep, attentiveness, and weight.
Explanation:
The Linnaean taxonomic system classifies organisms into divisions called taxa. If two
organisms belong to the same taxonomic group, they are related. Similarity at which of these
levels indicates the closest relationship?
E. Kingdom
G.
Class
H.
Order
J.
Genus
Answers
Answer:
Genus
Explanation:
The level that represent the closest relationship is to be considered as the option J i.e. Genus.
The Level that represent the closest relationship?The genus refers to the taxonomic rank that lies between the family and species. The group of an organism in a genus shared various structural similarities and they are closely related.
The members of gene should be more related to each other as they belong to the other genera in the similar family.
hence, the option J is correct.
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PLEASE FILL IN THE BLANKS
1. cells are the basic units of________and_______in all living things.
2.All cells come from____-________________ __________.
Answers
Answer: 1) structure, function
Explanation: 2) all cells come from existing cells
How was early Earth's atmosphere different from today's atmosphere?
Answers
Answer:
The early Earth was very different from our Earth today.
Explanation:
Earth's first atmosphere had lots of water vapor but had almost no oxygen. Later, frequent volcanic eruptions put several different gases into the air (Figure 12.13). These gases created a new type of atmosphere for Earth.
Answer:
The atmosphere we enjoy today is radically different from the atmosphere that formed with the Earth billions of years ago. ... As the Earth cooled enough to form a solid crust (4.4 billion years ago), it was covered with active volcanos. These volcanos spewed out gasses, like water vapor, carbon dioxide and ammonia.
How has the Earth's atmosphere changed over time?
Water vapor, carbon dioxide, methane, ammonia, and other gases similar to the ones produced by volcanoes today were expelled. Over a vast amount of time, millions of years, the earth gradually cooled. ... From these clouds, the oceans formed and the oceans absorbed a lot of the carbon dioxide in the atmosphere.
Explanation:
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