Answer:
Option (1).
Explanation:
Atom may be defined as the small part of an element that can be further divisible into the further particles. The three sub atomic particles are electron, proton and neutron.
Electrons revolve around the nucleus and protons, neutrons are present inside the nucleus. The electrons and protons number are equal in the neutral atom. The equal number of electron and proton makes the atom electrically neutral as whole.
Thus, the correct answer is option (1).
Describe the relationship between carrying capacity and earths resources
What is the name of the organelle found in animal cells whose function is energy production?
A. Mitochondrion
B. Chlorophyll
C. Chloroplast
D. Nucleus
Answer:
Mitochondrion
Explanation:
How does the cell membrane help cells maintain homeostasis
The cell membrane maintains homeostasis by controlling the movement of substances in and out of the cell, allowing cells to change shape as needed and recognizing other cells for tissue and organ formation and immune response.
Explanation:The cell membrane plays a crucial role in maintaining homeostasis within a cell. Homeostasis refers to a state of balance within a living organism, which is essential for the survival and functionality of its cells. A significant function of a cell's
plasma membrane
is to define the cell and determine its interaction with its environment. This membrane is selectively permeable, allowing it to control what substances enter or exit the cell.
Growth and dynamic homeostasis
are maintained through the constant movement of molecules across this membrane. The cell membrane must also be flexible to allow cells to change shape as required by their environment. Lastly, the surface of the plasma membrane carries markers for cell recognition, which is essential for tissue and organ formation, and the distinction between 'self' and 'non-self' in the immune response.
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What is the purpose of the biogeochemical cycles?
A.to cycle energy through a food chain
B.to recycle matter through the biosphere
C.to recycle rocks through the layers of Earth
D.to cycle nutrients through the human body
Turkins, a cross between a chicken and a turkey, are raised on some farms in Wyoming. This is an example of _____.
a)selective breeding
b)hybridization
c)cloning
d)recombinant DNA
Answer:
b) hybridization
Explanation:
Hybridization is the process of generating an offspring known as a hybrid from a cross between two individuals belonging two different species in order to accommodate the characters of these species into a single individual.
Since chicken and turkey are different species, a cross between them would lead to the generation of a hybrid known as Turkin.
Which of the following flower tissues is reproductive?
carpel
petal
sepal
tepal
Answer: a. Carpel flower tissues is reproductive.
Explanation: The carpel is present in the inner part of a flower known as a female reproductive organ. A carpel consists of a style, an ovary, and a stigma. The style is a long, slender tube that connects the stigma and the ovary. The Stigma is present in the top, sticky area of a carpel, where pollination takes place. Stigma is a place where the pollen germination takes place once the pollen deposited on the stigma. An ovary is a female reproductive part, which produces ova.
1.
Which of the following is true about ice sheets?
They are the smallest type of glacier.
They flow in all directions.
They usually flow down valleys.
They are found only in high mountain areas.
2.
The Antarctic Ice Sheet in the Southern Hemisphere ____.
is the only true ice sheet that remains on the planet
holds almost one-half of Earth’s salt water
holds almost two-thirds of Earth’s fresh water
contains about one-fourth of the world’s ice
3.
A thick ice mass that forms over the land from the accumulation, compaction, and recrys1.
Which of the following is true about ice sheets?
They are the smallest type of glacier.
They flow in all directions.
They usually flow down valleys.
They are found only in high mountain areas.
2.
The Antarctic Ice Sheet in the Southern Hemisphere ____.
is the only true ice sheet that remains on the planet
holds almost one-half of Earth’s salt water
holds almost two-thirds of Earth’s fresh water
contains about one-fourth of the world’s ice
3.
A thick ice mass that forms over the land from the accumulation, compaction, and recrys ...?
What conducts electric current in solutions?
elements
electrolytes
atoms
molecules
Answer:
Electrolytes
Explanation:
An electrolyte is a substance that conducts electricity when dissolved in a polar solution e.g water. They are particles that carry a positive or negative electric charge called Cations and Anions respectively.
Electrolyte can also be referred to as a substance that dissociates into ions in solution and acquires the capacity to conduct electric currents. It becomes an ionic conductor when fused or dissolved in a suitable solvent.
Electrolytes include Sodium, pottasium, calcium, bicarbonate and magnesium amongst other body minerals. These minerals carry a small electric charge in fluid environment.
Electrolytes conducts electric current in solutions. Therefore, the correct option is option B.
In order for our bodies to function properly, electrolytes are necessary, and realising this can do a lot for our general health. They are minerals that, when dissolved in water, take on an electrical charge and are necessary for a number of physiological activities. Sodium is one of the most well-known electrolytes. It is essential for maintaining the equilibrium of bodily fluids, neuron activity, and muscular contraction. Sodium influences how much water the body retains, which influences blood pressure. However, consuming too much sodium can result in health problems like high blood pressure and fluid retention.
Therefore, the correct option is option B.
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Foods that allow microorganisms to grow are called parasites. TRUE or FALSE
A triglyceride that is liquid at room temperature
A triglyceride that is liquid at room temperature is called OIL
LIPIDS (TRIGLYCERIDES):
Lipids are a type of biomolecule found in nature. They can be sterols, triglycerides, unsaturated fats, saturated fats, phospholipids etc. Triglyceride is a form of lipid formed from the esterification of a glycerol and three fatty acids. However, triglycerides can either be solid or liquid at room temperature. Solid triglycerides are called FATS while liquid triglycerides are called OILS.Therefore, a triglyceride that is liquid at room temperature is called OIL.
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Which of the following plant adaptations is not found in deciduous forests? a. They have broad leaves. b. They can absorb nutrients from the ground. c. They stretch toward the Sun. d. They keep their leaves year round.
Answer: d. They keep their leaves year round.
Plants in deciduous forests have special adaptations for survival in deciduous forests it depends upon the seasonal variations. In winters, because of lack of proper sunlight leaves are shed from the plants. As, without proper sunlight they are not able to conduct photosynthesis also the budding sites where the leaves originate also get blocked in order to prevent water loss through transpiration. Therefore, plants in deciduous forest does not keep their leaves year round.
Which of the following is true about unicellular organisms?? URGENT
A they often have specialized cells
B they are made up of one cell
C they lack organelles
D they are all plants
The correct answer is B, unicellular organisms are made up of one cell. They can have complex structures and functions, but they do not have specialized cells, are not all plants, and do not lack organelles.
The subject at hand is unicellular organisms. When considering unicellular organisms, the following statement is true: they are made up of one cell. Therefore, the correct answer to the question is B - they are made up of one cell. Unicellular organisms may have complex internal structures and can perform all the life functions within that single cell. They may have organelles and specialized structures, such as flagella for movement. However, unicellular organisms do not have specialized cells since each organism is comprised of a single cell. They are not all plants but can be found across various classifications such as bacteria, protozoa, and some algae.
Water can absorb more heat than land, but water does not increase in temperature as fast because it has a high A) polarity. B) surface area. C) heat capacity. D) surface tension.
Answer;
-Heat capacity
-Water can absorb more heat than land, but water does not increase in temperature as fast because it has a high heat capacity.
Explanation;
-Heat capacity is the capability of water to absorb heat without undergoing an increase in temperature. For water to increase in temperature, its molecules must be made to move faster within the water; which requires breaking hydrogen bonds that absorbs heat.
a behavior in which animals move toward or away from a light source.
Answer: Phototaxis
Explanation: Phototaxis is the phenomenon by which locomotory movement of the organism occurs towards or away from the stimulus of the light.
This is advantageous for the phototropic organism as they can move efficiently towards the sunlight which helps them to make food by the help of sunlight and other substances.
The phototaxis is called positive if the movement is towards sunlight and negative if the movement is against light.
In a dihybrid cross, the F2 will have nine genotypes, but only four phenotypes because the (Homozygous, Heterozygous) genes cause the (Recessive, Dominant) traits to mask the (Dominant, Recessive) traits.
SOS:
The answers is:
In a dihybrid cross, the F2 will have nine genotypes, but only four phenotypes because the Heterozygous genes cause the Dominant traits to mask the Recessive traits.
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Answer
heterozygus, dominant , ressesive traits
Explanation:
i did this test and got it right
Desert plants are characterized by
Which element in the southwestern desert ecosystem is abiotic?
Abiotic being non-living or sterile could cover a lot of elements in a desert ecosystem. Rocks, water, air to name a few.
The elastic rebound theory suggests which of the following?
Answer;
The elastic rebound theory suggest that; Most earthquakes are produced by the rapid release of energy stored in rock that has been subjected to great forces.
Explanation;
The elastic rebound theory was suggested by Henry Feilding Reid, who made observations and summarized that the earthquake occurs as a consequence of an elastic rebound of elastic strain energy that was previously stored in the rocks on either side of the fault.
The elastic-rebound theory explains how energy is produced when an earthquake occurs. According to this theory as adjoining plates on the Earth's surface move in opposite directions, then the rocks which span the opposing sides of the incipient fault are subjected to extreme shear stress.
The Elastic Rebound Theory explains the phenomenon of earthquakes caused by the sudden release of stored energy in strained rocks. When the stress exceeds the rock's strength, it fractures and rebounds, causing an earthquake.
Explanation:The Elastic Rebound Theory explains how energy is stored in rocks and is then released once the rocks crack or rupture, causing an earthquake. This theory is highly related to the study of tectonic plate movements and earthquakes. In a strained rock formation, when the stress exceeds the rock's strength, the rock fractures and subsequently rebounds, causing it to shake or vibrate leading to an earthquake. This displacement or movement of rocks is sudden and rapid, thus the term 'rebound'.
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Which is the first step in the scientific method
Is cooking an egg endothermic or exothermic chemical reaction?
Answer:
1:endo
2:exo
3:exo
4:neither
Explanation:
Which of the following IS NOT a reason why estuaries are important?
they provide a nursery for many types of fish
they are the least polluted areas of the ocean.
they are extremely productive
they are great for transporting goods for manufacturing and trade
they control flooding by acting as a buffer
Extensive commercial logging, the use of wood for cooking and heating, and excessive clearing of land by subsistence farmers has led to __________________ in most areas of Sub-Saharan Africa.
A)
erosion
B)
deforestation
C)
desertification
D)
water pollution
Answer:
the answer is b
Explanation:
Which of the following best describes the solar radiation absorbed by and radiated from earth?
a. Most incoming solar energy is absorbed by the atmosphere.
b. Only a small fraction of energy radiating from Earth is from the atmosphere.
c. The Earth’s surface is responsible for a small fraction of heat radiation to space.
d. Earth’s surface absorbs little of the energy that strikes as solar radiation.
Answer: c. The Earth’s surface is responsible for a small fraction of heat radiation to space.
Explanation:
In later ages the large amount of sun's energy is reflected back by the terrestrial surface back to the space. But now due to the abundance of large concentration of greenhouse gases in the atmosphere is responsible for the absorption of thermal energy from sunlight by these gases causing the atmosphere to be hot. This is the reason of global warming. Now only small fraction of heat is radiated back to the space.
What is it called when a molecule uses energy to move across a semipermeable membrane?
A. Diffusion
B. Active transport
C. Passive transport
D. Osmosis
Answer: Active Transport
Explanation:
The movement of the particles across membrane needs energy. Energy is required in the condition where there is a movement of particles from a lower concentration to higher concentration.
It requires cellular energy for the movement of the particles. The larger molecules needs energy to move across concentration gradient.
Can a dead cell carry out diffusion and active transport?
No, a dead cell cannot carry out active transport as it requires ATP, which dead cells do not produce. Diffusion may continue passively for some time, but active processes cease with cell death.
Can a dead cell carry out diffusion and active transport? No, a dead cell cannot carry out active transport because active transport requires energy, which is usually obtained from ATP. Living cells use metabolic energy to maintain concentration gradients of ions and other substances across their membranes. This energy is particularly crucial for active transport processes such as the Na+-K+ ATPase pumps in red blood cells, which maintain the imbalance of sodium and potassium ions across the cell membrane. Once a cell dies, it ceases to produce ATP, thus halting active transport mechanisms. While diffusion is a passive process that might continue for a time after a cell perishes due to existing concentration gradients, without ATP, the active transport processes cannot occur in a dead cell.
In plant, algae, fungi, and most bacteria cells, there is a rigid layer that surrounds the cell membrane and gives protection, support, and shape to the cell. what is this layer called?
a. cell wall
b. cytoplasm
c. chloroplast
d. plasma membrane
A fold where the youngest rock layer is in the center is called a(n) _____.
monocline
decline
syncline
anticline
A geological fold where the youngest rock layer is at the center is known as a syncline, a concave-upward fold with beds dipping towards the center.
A fold where the youngest rock layer is in the center is called a syncline. In geological terms, a syncline is a trough-like or concave-upward fold in which the beds dip towards the fold's central axis. By contrast, anticlines are the opposite, where the oldest rock layers are in the center and the rock layers dip away from the central axis. Synclines often appear as 'U' shaped formations in the Earth's surface and are indicators of the relative ages of strata within folded rock formations.
The farming methods promoted by the California Ricelands Habitat Partnership are best described as beneficial to both farmers and wetland species because _______. Answer: The farming methods promoted by the California Ricelands Habitat Partnership are best described as beneficial to both farmers and wetland species because California Rice Commission and individual growers to further enhance the habitat [ value of California’s rice fields to waterbirds. This collective approach creates synergy for fully realizing the wildlife values in California rice
The farming methods promoted by the California Ricelands Habitat Partnership are best described as beneficial to both farmers and wetland species because the foraging birds there eats the remains or leftover rice in the field and in turn overwhelm the ground making tilling additional.
This benefits both the birds and farmers as birds gain food from there and the farmers get a free tilling of their land.
According to cell theory, which activity is impossible?
A. Heart cells forming from other heart cells
B. Plants using energy from the sun
C. Cells being formed from pure water
D. Eukaryotes being in a multicellular organism
The correct answer is option (c). Cells being formed from pure water.
The cell is composed of many different substances. All the different substances of the cell cannot be obtained by pure water only.
The pure water only contains hydrogen and oxygen molecules. But, the most abundant atom in the cell is carbon and also have nitrogen, sulfur and other atoms. Pure water cannot provide atoms other than hydrogen and oxygen, so, it is impossible for the cell to be formed by pure water.
Cells function together to form tissues. The four main types of tissues in animals are _____.
epithelial
blood
connective
muscular
nervous
bone