The basic condition for the abundance of plants in an aquatic environment is ....
Availability of fresh water
Availability of an adequate amount of light to complete the process of photosynthesis
High salinity
Low carbon dioxide
How does pressure affect a point inside a liquid?
In all directions equally
From above only
From below only
In opposite directions
Which of the following is not a characteristic of gaseous materials?
Easily compressible
Resists compression
Occupies any space in which they are found
Does not have a fixed volume
Solar radiation energy can be converted into .....
Electrical energy
Thermal energy
All of the above
A fish is subjected to a pressure of 8 atm, so it is found at a depth equal to ..m
35
7
80
70
The pressure exerted by a man on the surface of the earth is greater when
He stands with one foot on the ground
He lies on the ground
He stands on the toes of one foot on the ground
He stands with both feet on the ground
A boat traveling at a speed of 50 m/s for a distance of 100 m, the amount of pressure exerted on it is equal to …atm
125
1
100
10
The opposite figure shows two different regions of ocean water, a shallow coastal water area A and an open water area B. What do the colors of regions A and B look like…..
The color of region A ..........The color of region B .................
Tends to blue /Tends to red
Tends to green/Tends to blue
Tends to blue/Tends to green
Tends to red/Tends to green
The opposite figure represents solar radiation at sea level. The ratio between the intensities of the two wavelengths is 1500 nm / 500 nm, respectively, of solar radiation at sea level....
Equal to one
Less than one
Greater than one
Answer cannot be determined
The ocean current that carries warm water from the equator towards the North Atlantic Ocean ..
Gulf Stream
Photosynthesis
Visible light
Solar radiation
Tilapia has... that helps it move between depths
Large lungs
Small gills
Air bladder
Liver rich in oils
Which marine organisms can withstand higher pressure?
Deep-sea organisms
Organisms that live at medium depths
All are equal
Surface organisms
The opposite figure represents four regions of the electromagnetic spectrum. Which of the following represents regions A and B of the spectrum, respectively?
Region A
Ultraviolet rays
Region B
Infrared rays - X-rays
Infrared rays - micrometer rays
X-rays - gamma rays
X-rays - infrared rays
The opposite figure represents three regions x, y, z in ocean water. Which of these regions is the most suitable for the presence of autotrophic algae?
Area x
Area y
The three regions are of equal load
Area z
It is considered...a more flexible and lighter tissue, which gives fish high flexibility
Cartilage
Fat
Bones
Proteins
In which of the following climatic seasons does the rate of decline in the number of marine organisms in the polar regions increase ....
Winter
Spring
Autumn
Summer
Evaporating water appears blue because ....
Water absorbs blue light wavelengths first
Water does not absorb blue light wavelengths
Blue light wavelengths penetrate to greater depths compared to other colors
The surface of the water reflects blue light wavelengths
What are fluids?
Materials that have only an unstable shape
Materials that are characterized by their ability to flow
Materials that have a fixed volume and shape
Materials that have only a fixed volume
Which of the following organisms is exposed to less water pressure?
Organisms that need more light
The pressure of the liquid in communicating vessels does not depend on
The acceleration of gravity
The shape of the vessels
The density of the liquid
The height of the liquid
What is the importance of lipoproteins in the cell membranes of marine organisms?
Does not affect the membrane
Increase the volume of the membrane
Reduce the area of the membrane
Increase the flexibility of the membrane
Sharks are...
Jawless
Bony fish
Cartilaginous fish
Mammals
Which of the following regions of the electromagnetic spectrum has waves with shorter wavelengths ...
X-rays
Radio waves
Gamma rays
When solar radiation moves from space to the Earth’s atmosphere, it .....
It is completely absorbed in the atmosphere
It is completely scattered in the atmosphere
It reaches the Earth’s surface completely
Most of it reaches the Earth’s surface
If you know that Barra coda and cod cannot exist together in the ocean at the same latitude because each type of them .....
Predatory fish
Has Adaptations to a certain temperature
Lives at different depths in the ocean
Has adaptations to a certain light intensity
It helps... fish to float and balance in the water
Lipoproteins
Swim bladder
Cartilaginous skeleton
Large gills
The opposite figure shows two points X, y at two different depths in the ocean water. If the energy of visible light at point x equals E, then the energy of visible light at point y equals approximately …..
1/4E
E
1/2E
1/3E
photosynthesis important for maintaining the ecological balance in the ocean
True
False
All of the following are units of pressure except …
W
N/m2
Pa
Bar
What are the adaptations that help fish move upward in the water?
Swim bladders
Large liver
Fins
Bony fish...
Shark
Tilapia
Whale
Ray
The level of the connected seas and oceans is at the same horizontal level, due to the equality of
The depth of the water
The volume of the water
The area of the water
Which of the following quantities decreases in summer with increasing depth in the Red Sea waters? ...
Water density and temperature
Water temperature and light intensity through it
Water temperature and pressure
Water density and pressure
Solar radiation that reaches sea level without being scattered ....
Direct solar radiation
Chemical energy
A process carried out by aquatic plants to convert solar energy into chemical energy used in building organic materials .....
The diffusion process
The demolition process
The photosynthesis process
The transpiration process
When solar radiation passes through the surface layer in ocean water…. • Absorbs long wavelengths of visible light first
Absorbs short wavelengths of visible light first
Does not absorb any of the wavelengths of visible light
Absorbs long wavelengths of visible light first
Completely absorbs all wavelengths of visible light together
Of the marine organisms that live in cold regions ....
Cod
Coral reefs
Barra coda
Tuna
What is the unit used to measure pressure?
Kg/m3
Joule
M/s2
Which of the following is not a fluid?
Ice
Oil
Atmospheric air
Mercury
Of the fish that can be found in the Atlantic Ocean at the equator ...
Tuna and cod
Cod only
Barra coda and tuna