Answer:
The tiger's closest living relatives were previously thought to be the Panthera species lion, leopard, and jaguar.
Explanation:
Results of genetic analysis indicate that about 2.88 million years ago, the tiger and the snow leopard lineages diverged from the other Panthera species, and that both may be more closely related to each other than to the lion, leopard and jaguar. The geographic origin of the Panthera is most likely northern Central Asia or the Holarctic region. The tiger–snow leopard lineage dispersed in Southeast Asia during the Miocene.
Panthera zdanskyi is considered to be a sister taxon of the modern tiger. It lived at the beginning of the Pleistocene about two million years ago, its fossil remains were excavated in Gansu province of northwestern China. It was smaller and more "primitive", but functionally and ecologically similar to the modern tiger. It is disputed as to whether it had the striping pattern. Northwestern China is thought to be the origin of the tiger lineage. Tigers grew in size, possibly in response to adaptive radiations of prey species like deer and bovids, which may have occurred in Southeast Asia during the Early Pleistocene.
what happens to cells formed by meristematic tissue
Answer:
The cells formed by meristematic tissue take up a specific role and lose their ability to divide. As a result, they form a permanent tissue. This process of taking up a permanent shape, size and function is called differentiation.
Please mark me as brainlist.In pigeons, the allele B produces blue feathers. The allele W produces white feathers. The B and W alleles are codominant. A blue and white pigeon BW is crossed with a solid white pigeon WW. What percent of the offspring are expected to be blue and white?
Answer:
The correct answer is - 50%.
Explanation:
Codominance is a type of inheritance that takes place when the genotype of an individual organism in heterozygous condition express traits of both alleles.
Cross between blue and white pigeon and pure white:
BW × WW and gametes will be B and W and W and W
B W
W BW WW
W BW WW
There are 50% of BW that is blue and white pigeons
Cells can best be described as
Cells can best be described as the fundamental units of life. They are the building blocks of all living organisms, including plants, animals, and even microorganisms.
Here are some key characteristics that describe cells:
1. Structure: Cells have a defined structure with a plasma membrane that separates the internal components of the cell from the external environment. Inside the cell, there is a variety of organelles, such as the nucleus, mitochondria, and ribosomes, each playing a specific role in cell function.
2. Function: Cells carry out various functions necessary for life. They perform metabolic processes, such as respiration, photosynthesis, and protein synthesis. Cells also maintain homeostasis, which involves regulating internal conditions to keep the cell functioning optimally.
3. Reproduction: Cells have the ability to reproduce. They can divide and create new cells through processes like mitosis and meiosis. This ensures the growth, development, and repair of tissues and organs.
4. Genetic Material: Cells contain genetic material in the form of DNA (deoxyribonucleic acid). DNA carries the instructions for cellular activities and determines the characteristics of an organism. It is organized into genes, which are passed on from one generation to the next.
5. Specialization: Cells can be specialized to perform specific functions within an organism. For example, muscle cells contract to enable movement, while nerve cells transmit electrical signals for communication. This specialization allows multicellular organisms to have different cell types that work together to maintain overall function.
Overall, cells are the basic structural and functional units of life. They are responsible for all the processes necessary for an organism's survival and are crucial for maintaining life's complexity and diversity.
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Place a checkmark next to each cellular component necessary to build a bacterial cell:
plasma membrane
cell wall
DNA
nucleus
mitochondria
chloroplast
Golgi apparatus
rouch endoplasmic reticulum
smooth endoplasmic reticulum
flagella
Answer: Cell wall, DNA, plasma membrane
Explanation:
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The cellular component necessary to build a bacterial cell include:
Cell membraneDNACell wallRibosomesCytoplasmFlagellaWhat is Bacteria?These are micro-organisms which can't be seen with the eyes but with the use of instruments such as microscope.
They lack a nucleus and their DNA is usually found in the nucleoid region of the cell.
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The fish in the first bowl couldn't have baby after baby after baby forever. The bowl filled up with fish and many fish died. A bowl this size can only keep three fish alive. What is it called when an area/home/ecosystem has a limit to the number of living things that can live there?
Answer: Carrying capacity
Explanation:
The carrying capacity can be defined as the ability of an ecosystem to sustain a particular number of members of the population of species in terms of availing resources for survival.
According to the given situation, the fish bowl is an ecosystem which can only sustain a particular number of fishes. Thus, the increase in the population of baby fishes was not supported by the fish bowl.
Using information from the diagram, state one reason why the movement in the third image represents active transport
Answer:
A protein or ion has passed through the "pump" or carrier proteins and move within the cell.
Nvm short and sweet ;)
Further info..
To move substances against a concentration or an electrochemical gradient, the cell must use energy. This energy is harvested from ATP that is generated through cellular metabolism. Active transport mechanisms, collectively called pumps or carrier proteins, work against electrochemical gradients. With the exception of ions, small substances constantly pass through plasma membranes. Active transport maintains concentrations of ions and other substances needed by living cells in the face of these passive changes. Much of a cell’s supply of metabolic energy may be spent maintaining these processes. Because active transport mechanisms depend on cellular metabolism for energy, they are sensitive to many metabolic poisons that interfere with the supply of ATP.
Organisms that produce their own food release oxygen into the air. This oxygen is important to the environment because —
A. animals breathe in and use this oxygen.
B. oxygen helps prevent storms that can harm the environment.
C. animals use oxygen to make water.
D. oxygen helps make sure the temperature stays the same.
Answer:
A. animals breathe in and use this oxygen.
Explanation:
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Which of the following does not occur in an aquatic ecosystem as a result of nutrient loading?
a. acidification of the water
b. algae growth as a result of eutrophication
c. degraded quality of water for human and livestock consumption
d. improved water habitats for human recreation
Answer:
Answer D
Explanation:
improved water habitats for human recreation
What are some of the major forces that influence the movements of the oceans?
Vhy did the color of the peppered moth change?
A.The moths' life cycle changed,
B.The environment changed
C.The amount of variation in the moth population changed
D.The number of individual moths in the population changed,
Answer:
the environment changed
Explanation:
The evolution of the peppered moth is an evolutionary instance of directional colour change in the moth population as a consequence of air pollution during the Industrial Revolution. ... Later, when pollution was reduced, the light-coloured form again predominated.
Answer:
B.The environment changed
Explanation:
Which statement BEST describes the cell membrane in a typical bacterial cell? The membrane...
a)has the same permeability to all substances moving in and out the cell.
b) selectively controls what enters and exits the cell.
c) is composed of two protein layers with lipids floating inside.
d) is composed of protein and carbohydrates only.
Answer:
Explanation:What’s a cell? Well, on some level, it's a bag of goo. The plasma membrane—the outer boundary of the cell—is the bag, and the cytoplasm is the goo.
Of course, a cell is ever so much more than just a bag of goo. It's a complex, highly organized unit, the basic building block of all living things. And the plasma membrane and cytoplasm are actually pretty sophisticated.
The membrane is a delicate, two-layered structure of lipids and proteins, and it controls what can enter and exit the cell. Similarly, the cytoplasm of a eukaryotic cell consists not only of cytosol—a gel-like substance made up of water, ions, and macromolecules—but also of organelles and the structural proteins that make up the cytoskeleton, or "skeleton of the cell."
In this article, we’ll take a closer look at the plasma membrane and cytoplasm.
The plasma membrane
Both prokaryotic and eukaryotic cells have a plasma membrane, a double layer of lipids that separates the cell interior from the outside environment. This double layer consists largely of specialized lipids called phospholipids.
A phospholipid is made up of a hydrophilic, water-loving, phosphate head, along with two hydrophobic, water-fearing, fatty acid tails. Phospholipids spontaneously arrange themselves in a double-layered structure with their hydrophobic tails pointing inward and their hydrophilic heads facing outward. This energetically favorable two-layer structure, called a phospholipid bilayer, is found in many biological membranes. [Close-up of a phospholipid]
As shown below, proteins are also an important component of the plasma membrane. Some of them pass all the way through the membrane, serving as channels or signal receptors, while others are just attached at the edge. Different types of lipids, such as cholesterol, may also be found in the cell membrane and affect its fluidity.
Body cavities diagram I need help
Which concept is not a part of the theory of evolution?
A. Present-day species developed from earlier species.
B. Some species die out when environmental changes occur.
C. Complex organisms develop from simple organisms over time.
D. Change occurs according to the needs of an individual organism to survive.
Answer:
D. Change occurs according to the needs of an individual organism to survive.
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HELP ME FILL IN THE BLANKS
Oceanic crust is ___________ dense than continental crust, thus it goes underneath the continental crust forming a ________________.
Answer:
More dense
Explanation:
4) How many milligrams are in 1,455 grams?
1,455,000 mg
145,000 mg
1,450 mg
1.45 mg
O
145 mg
Grams can be converted into milligrams by multiplying the amount in grams by 1000. Therefore, 1455 grams will be equivalent to 1,455,000 mg. Thus, the correct option is A.
The conversion of metric units from one unit to another can be done by multiplication or division by powers of 10. If the unit is to be converted into a bigger unit, it has to be divided, whereas if the unit is to be converted into a smaller unit, it has to be multiplied.
Thus, the conversion of gram to milligram is conversion of a unit into a smaller unit and the amount, therefore, has to be multiplied.
There are 1000 milligrams in 1 gram. Therefore, 1,455 grams will have 1000 × 1,455 = 1,455,000 milligrams.
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List the six nitrogen bases that would pair with the following sequence of bases in a strand of DNA : T C G A C A
Answer: thymine (T) Cyostine (C) guanine (G) adenine (A)
Explanation:
Guanine (G) is complementary to cytosine (C), and adenine (A) is complementary to thymine (T). Hence, the nitrogenous bases that would form for the DNA bases TCGACA are AGCTGT.
How does base pairing take place in DNA?
A DNA double helix is joined together by the hydrogen bonds that are formed between the nitrogenous bases in the opposite strands. Adenine (A), Guanine (G), Cytosine (C), and Thymine (T) are the nitrogenous bases present in the DNA. Both adenine and guanine are purines. They make bonds with pyrimidine.
Adenine (A) of one DNA strand makes a double bond with Thymine (T) of the opposite DNA strand. The guanine (G) of one DNA strand makes three hydrogen bonds with the cytosine (C ) of the opposite DNA strand. As there are three hydrogen bonds present in guanine and cytosine (GC), they require more energy to break the bond. Adenine and thymine (AT) have two hydrogen bonds, hence they require less energy than GC bonds.
Hence, in a DNA strand, the complementary strand of TCGACA is AGCTGT.
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Which of the following is NOT a
form in which water can exist on
Earth?
A. gas
B. solid
C. plasma
D. liquid
Answer:
plasma
Explanation:
becaus gas is steam you can boil water and get steam solid because of ice and liquid because of water
With respect to one another, galaxies have been found to be
1. moving closer together
2.moving farther apart
3.moving in random directions
4.stationary
With respect to one another, galaxies have been found to be moving farther apart from each other. The correct option is 2.
What are galaxies?Galaxies are large areas that contain stars, dark matter, dust, interstellar gases, etc. It is a gravity-bound system that contains everything in its own place.
There are many galaxies, some are still undiscovered. Our galaxy in which the earth is present is called the Milky Way. It is called the Milky Way because due to many stars it looks like a shiny white path.
Now, the Big Bang Theory says that the universe is made up of expanding of a single point. And the universe is still expanding, so the galaxies' and other matters still going farther away.
Thus, the correct option is 2. Moving farther apart.
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Which cellular process does a mitochondria perform for the cell
Answer:
cellular respiration
Explanation:
Cellular respiration is when oxygen is used to make energy
Which of the following shows an unsaturated fatty acid?
Answer:
I belive the answer is B or C
Explanation:
Answer: its D
Explanation: i got it wrong cause of these guys
what is an example of carbohydrates?
Answer:
Glucose
Explanation:
Glucose is an important carbohydrate. Other carbohydrates include starch, lactose, cellulose, and fructose.
What's the function of prop roots?
Explanation:
plays a substantial role in endowing certain plants with extra structural support.
Answer: The roots of a plant function in many different ways, including absorbing nutrients and water, providing anchorage, and acting as a food storage site.
Explanation:
how many atoms of nitrogen are in a chemical formula Ni(NO3)2?
O 3
O 2
O 1
O 6
Answer:
2
just did test
Explanation:
what structure do plant have for making food that animals do not
Explanation:
Animal cells each have a centrosome and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not
when we observe an organism or environment what are we observing A. changes B. similarities C. colors
Answer:
II really have no idea but it might be A?
Explanation:
If I'm wrong I'm so sry T-T
Answer:
A. changes
Explanation:
i took the test and i got it correct trust me
Which of the following help break down rock into soil? *
O A. Lichen
O B. Weeds
C. Shrubs
O D. Trees
Answer:
It’s lichen baby
Is a thorn bug endangered?
Answer:
i think so
Explanation:
sorry if im wrong
A professor researching sea stars off the coast of France has been offered a position a a Mexican university. Should the researcher assume that his pas!
experiments would produce the same results in the coastal regions of Mexico?
No because the experiments are no longer valid if they are disassembled
Yes because performing experiments under different conditions further validates the results
Yes because the same experiment should yield the same results everywhere in the world
No because the environmental conditions in Mexico will be different producing uncontrol anables
Answer:
It is the Last one
Explanation:
No because the environmental conditions in Mexico will be different producing uncontrol anables
Answer:
The Answer is D. No, because the environmental conditions in Mexico will be different, producing uncontrolled variables
Explanation:
he is traveling to another part of the earth on a different coast with different conditions. It would be much more different. Perhaps there are other species and everything. Some results could be similar but most of them wont.
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Which of these events breaks down rocks into smaller pieces? (4 points) Sedimentation Deposition Weathering Erosion
Answer:
Weathering
Explanation:
Weathering is the breaking down or dissolving of rocks and minerals on Earth's surface. Once a rock has been broken down, a process called erosion transports the bits of rock and minerals away. Water, acids, salt, plants, animals, and changes in temperature are all agents of weathering and erosion.
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Answer: Weathering breaks down rocks into smaller pieces.
Explanation:
. If a suggested daily protein consumption of .8 grams / Kg. Body weight is recommended, how many protein Kcals would be represented in the diet of a 220 lb. Individual with no suggested health concerns or limitations? (Kgs. = lbs. / 2.2 ; The caloric density of protein is 4 Kcals / gm.)
Answer:
The correct answer would be - 320 kcal.
Explanation:
Given:
Required protein amount is - .8 grams/kg
kg = lbs/2.2
weight = 220
then, weight in kg = 220/2.2 = 100 kg
solution :
requied amount of protein in normal individual:
= 100* 0.8
= 80 grams.
Now kcal by this amount of protein would be :
= 80*4
= 320 Kcal
Thus, the correct answer would be - 320 kcal.
The amount of protein Kcals in the individual's diet would be 320 Kcals.
The recommended daily protein consumption = 0.8grams / Kg body weight
The body weight of the individual is given as 220 lbs.
The weight of the individual would need to be converted to Kg.
Conversion factor between Kg and lbs is given as: 1 Kg = 2.2 lbs
The weight of the individual in Kg = 220 lbs * 1 kg /2.2 lbs ) = 100 kg
Amount of recommended protein intake of the individual based on body weight will be: 0.8 grams/ Kg * 100 Kg = 80 grams
Caloric density of protein per gram = 4 Kcals / gram
Therefore, protein Kcals in the individual's diet will be 4 Kcals / gram * 80 grams = 320 Kcals
The amount of protein Kcals in the individual's diet would be 320 Kcals.
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