Answer: They have enough food in the tropical region and are no longer searching for mates.
Explanation:
The Sanderling is a energetic, small and plump wading bird. It posses medium length legs which are black and short straight black bill. It is white underneath and pale grey above. It is native of southern UK but migrate to the coastal regions of south during spring for breeding.
According to the given situation, the members of the Sanderling population which are beyond the breeding age do not migrate as they have enough food and they have lost the tendency to copulate and search the mates.
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.
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.
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.
Cells function together to form tissues. The four main types of tissues in animals are _____.
epithelial
blood
connective
muscular
nervous
bone
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 ...?
Over the last several decades, the scientific community has gathered a large amount of information regarding genetics and genetic variation. What are two main sources that lead to increased genetic variation?(((((Both answers must be selected.))))) A) Selective breeding, B) Gamete mutations, C) Recombination, D) Genetic drift
Answer:
B) Gamete mutations, C) Recombination
Explanation:
Any random changes in the DNA of gametes are called as gamete mutations. These mutations are transmitted to the next generation via gametes and thereby the genetic variations are increased.
Recombination is the production of new gene combinations. Crossing over during meiosis I of gamete formation add new gene combinations to gametes. Random fertilization of these gametes add even more genetic variations to the progeny.
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.
Desert plants are characterized by
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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How to separate genomic DNA and plasmid?
...?
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.
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.
Is cooking an egg endothermic or exothermic chemical reaction?
Answer:
1:endo
2:exo
3:exo
4:neither
Explanation:
What are microwaves are used for?
A. cell phone transmitters and cooking food
B. T.V. signals
C. visible light
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
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
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.
Occasionally asexual reproduction can cause undesirable proliferation of an organism.
True
False
Answer: True
Asexual reproduction is a process in which single parent organism produces offsprings. This occur in simple organisms like bacteria, prokaryotes and fungi where a single cell breaks down into two or more numbers of daughter cells. The asexually reproduction can cause undersirable proliferation because the environment will not be able to sustain such a undesirable increase in number of offsprings and ultimately offsprings will die.
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.
What is an important function of the mitochondria?
Explanation:
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Let's solve this!
Mitochondria with organelles present in eukaryotic cells. In them, cellular respiration occurs, a process by which carbon dioxide is converted into oxygen. In addition, the Krebs cycle that is part of cellular respiration occurs.
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.
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
Why is it important for the cells of multicellular organisms to undergo mitosis?
Biogeochemical cycles recycle water and natural elements throughout the biosphere to ensure that organisms do not run out of these substances. Thiobacillus denitrificans is a specialized species of bacteria that obtains its energy from carbon dioxide and inorganic compounds such as nitrogen in its environment. It is used in bioremediation of groundwater that contains excess nitrate. How does Thiobacillus denitrificans help bioremediate groundwater? nitrification denitrification nitrogen fixation decomposition
Final answer:
Thiobacillus denitrificans helps in the bioremediation of groundwater by performing denitrification, converting excess nitrates into nitrogen gas and reducing nitrate pollution.
Explanation:
Thiobacillus denitrificans plays a crucial role in the biogeochemical cycles by performing denitrification. This specialized species of bacteria helps in bioremediating groundwater by converting excess nitrates (NO₃⁻) into nitrogen gas (N₂), effectively reducing nitrate pollution. Denitrification is an essential process in the nitrogen cycle as it prevents the accumulation of nitrates which can lead to eutrophication of aquatic systems and groundwater contamination. Denitrification by Thiobacillus denitrificans demonstrates the beneficial application of bacteria in removing pollutants from the environment, supporting sustainable agriculture and ecosystems.
Organisms at the bottom of the pyramid produce enough usable chemical energy to support the entire ecosystem through
A) predation.
B) photosynthesis.
C) cell respiration.
D) anaerobic respiration.
Answer: The correct answer is -
B) photosynthesis
Explanation:
Photosynthesis can be described as process of creating food (in the form of glucose) in green plants, algae, and some protist (that are called producers). It uses inorganic molecules that are carbon dioxide and water in the presence of energy from sunlight to synthesise glucose and release oxygen as waste in surroundings.
It takes place in the specialized membrane bound organelles, called chloroplast.
Producers occupy the base of any food chain, which can be represented by energy pyramid, thus they produce enough chemical energy to support the entire ecosystem through photosynthesis.
Which is the first step in the scientific method
DNA is coiled into chromosomes in a cells
The right answer is in a cell's nucleus.
The nucleus contains the DNA (deoxyribonucleic acid) on which is encrypted the genetic information: the chromosomes.
When the cell is not in a fission period, the DNA is pelletized and the chromosomes can not be seen. On the other hand, as soon as it enters the period of fission, the DNA unfolds and the chromosomes are clearly visible in batonets, so that they can be doubled.
Describe the relationship between carrying capacity and earths resources
Explain the interaction between the central nervous system and the peripheral nervous system.
The crucial regulatory, controlling and communicating system of the body is called the nervous system. It has an important role in acquiring and giving responses to a stimulant.
How do Central nervous system and PNS interact?The central nervous system comprises of the brain and spinal cord while the PNS have nerves spread throughout the body parts.The PNS connects the central to the body tissues, organs and skin structures with the help of nerves. The central nervous system receives information from the PNS via the nerves and helps in transmitting the response to the action received.Therefore, PNS and central nervous system are interrelated to each other for functioning.
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Which of the following is not a contributing factor to the declining Atlantic cod population?
A.) Destruction of marine habitats
B.) Increasingly efficient fish-harvesting technologies
C.) International treaties reducing competition among fishing fleets
D.) Decreases in ocean temperatures