Answer:
Whales and dolphins are mammals and breathe air into their lungs
Explanation:
They cannot breathe underwater like the fish can as they do not have gills.
which of these would lead to an increase in carbon dioxide in the atmosphere? Select the TWO (2) that apply
1.a decrease in respiration
2.a increase in respiration
3.a decrease in photosynthesis
4.a increase in photosynthesis
Jayne's science class is doing a laboratory investigation on cells. Her teacher gives them each a cotton swab to collect cheek cells from their mouths. They then smear the cheek cells onto a glass slide and look at the cells under a microscope.
What can Jayne expect all of her cheek cells to contain?
A.
a cell wall
B.
a nucleus
C.
a chloroplast
D.
all of these
Answer:
B. a nucleus
Explanation:
cell walls and chloroplast are both found in plant cells, not in animal cells
Answer:
Explanation:
A nucleus because a cell wall and a chloroplast are found in plant cells.
In 2001, scientists found a fossilized skeleton from about 110 million years ago. The fossil resembled a modern crocodile in virtually every way, except for one: The fossil was 40 feet long, which is almost twice as long as the largest modern crocodile ever found. From this discovery, scientists concluded that
We can confirm that scientists used this discovery to conclude that crocodiles evolved to be smaller over time.
Why would small size help Crocodiles?Over time, many animals on the Earth evolved to smaller sizes. This made large predators unlikely to survive as they would need to hunt much more often than that of smaller predators in order to sustain themselves. This along with an increase in mobility explains some of the reasons why it was beneficial for crocodiles to evolve to be smaller over time.
Therefore, we can confirm that scientists used this discovery to conclude that crocodiles evolved to be smaller over time.
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Where is chlorophyll found?
in the roots
in the stem
in the chloroplast
in the stomata
Answer:
In the chloroplast.
Explanation:
Chlorophyll is a green pigment plants use to absorb light so they can make food via photosynthesis. Chloroplasts are organelles that contain chlorophyll, so it only makes sense that the best answer is the chloroplast.
Answer:
C is your answer
Explanation:
Using your model, which of these would lead to an increase in carbon dioxide in the atmosphere? Select the TWO (2) that apply
Answer:
Carbon Dioxide is a gas it is always part of the atmosphere. However Carbon Dioxide gas can be removed and returned to the atmosphere.
Explanation:
Plants use Carbon Dioxide as one of the two main reactants in the process of photosynthesis. Photosynthesis removes Carbon Dioxide from the atmosphere turning the Carbon into Carbohydrates, such as cellulose found in wood.
Cellular Respiration, burning coal, wood, gasoline, turn the Carbon-based molecules back into Carbon Dioxide and water. These Oxidation reactions return the Carbon Dioxide to the atmosphere
Explanation:
MARK A BRAIN LESS
CARRY ON LEARNING
Who discovered the advantages of AC over DC( alternating current and direct current)?
Answer:
At the close of the nineteenth century, Thomas Edison was working on perfecting his system of direct current (DC) for electric power distribution. Meanwhile, the inventor and physicist Nikola Tesla was discovering the benefits of his competing alternating current (AC) system.
Explanation:
25. A nerve fiber that conducts impulses toward muscles and glands is called a __________ fiber. A nerve that conducts impulses toward the brain and spinal cord is called a __________ fiber.
Answer:
A nerve fiber that conducts impulses toward muscles and glands is called a _____motor_____ fiber. A nerve that conducts impulses toward the brain and spinal cord is called a ______afferent____ fiber.
A nerve fiber that conducts impulses toward muscles and glands is called a motor neuron fiber. A nerve that conducts impulses toward the brain and spinal cord is called a sensory nerve fiber. Both are important for the proper functioning of the body.
What are sensory and motor nerve fibers?The sensory nerve fibers send the stimulus in the form of an impulse from the sensory organs to the spinal cord, where the sensory organs can be skin, eyes, etc. An example is when a person sees a dog coming towards them, and the sensory nerve fiber that is associated with the eye sends the signal from the eye to the spinal cord. The spinal cord takes proper action by sending the motor nerve fibers to the effector organ, which is the leg muscle. In this case, the individual will run.
Hence, A nerve fiber that conducts impulses toward muscles and glands is called a motor neuron fiber. A nerve that conducts impulses toward the brain and spinal cord is called a sensory nerve fiber.
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Nonspecific chemical defenses of the human host include all of the following EXCEPT ______. multiple choice 1 antibodies lysozyme lactic acid hydrochloric acid
Nonspecific chemical defenses whose main function is to prevent the entry of pathogens include all except antibodies.
What are antibodies?It is a protein that reacts against an antigen in an animal-like organism, that is, they adhere to a specific antigen.
Specific antibodies can neutralize toxins, viruses or enzymes as part of the immune response.
Therefore, we can conclude that nonspecific chemical defenses whose main function is to prevent the entry of pathogens include all except antibodies.
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Mutations and genes regulations
Explanation:
who many chambers does the heart has
Survival of the fittest and evolution were proposed by what scientist?.
Answer:
Charles darwin
Explanation:
i looked it up
Of the four classes of tissues______tissues are the most abundant, widely distributed and histologically variable of the primary tissues.
Epithelial tissues are the most abundant, widely distributed, and histologically variable of the primary tissues.
What is epithelial tissue?The epithelium is a type of tissue that is present in the covering on all internal and external surfaces of your body and also present in glands.
So we can conclude that epithelial tissues are the most abundant, widely distributed variable of the primary tissues.
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PLEASE HELP 20 POINTS DUE
Answer:
bacteria
Explanation:
Hippopotamuses live in Africa’s rivers and lakes. They’re herbivores and coexist with other herbivores and carnivores. Which action could lead to a decrease in the number of hippos?
A.
a decrease in the number of predators
B.
a decrease in the number of other herbivores
C.
an increase in the number of producers
D.
an increase in the number of other herbivores
Answer:
D
Explanation:
hippo funny, use common sense silly bean
Answer:
D, an increase in the number of herbivores.
Explanation:
D is the correct answer because an increase in other herbivores would mean more competition for food, and more herbivores means that they would be eating/taking the hippo's main source of food.
Can you identify the structures of the human digestive system?.
Answer:
The main organs that make up the digestive system (in order of their function) are the mouth, esophagus, stomach, small intestine, large intestine, rectum and anus. Helping them along the way are the pancreas, gall bladder and liver. Here's how these organs work together in your digestive system.
A 40x objective lens and a 10x eyepiece will jointly provide a
magnification of
Your answer
This is a required question
a
Answer:
400x
Explanation:
40x*10x=400x
How is the dormant form of rickettsia rickettsii activated?.
Answer:
The bacteria are activated through exposure to acids in the gut of the Dermacentor tick. The bacteria are activated after the tick feeds on a host for several hours. The bacteria are activated when the tick reaches its adult stage.
Explanation:
The principle hormones produced by the thyroid gland are:.
The principle hormones produced by the thyroid gland are:. T3 (tri-iodothyronine) and T4 (thyroxine).
What is thyroid gland?Thyroid gland is two globular structure present in the neck. This gland produce growth hormone. It is an endocrine gland.
The thyroid hormone helps in regulating the use of energy by the body. These hormones help in growth and development of the body.
Thus, the hormones are T3 (tri-iodothyronine) and T4 (thyroxine).
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The cell membrane protects our cells
against infections by invaders, but
sometimes the cell membrane isn't 100%
effective at preventing these infections.
What happens when an infection occurs
in a cell?
A. The invader is kept out of the cell by the cell membrane.
B. The invader is denied entry into the cell by the cell
membrane.
C. The invader finds a way into the cell.
The white matter of the cerebellum is known as the.
Answer: Arbor vitae
Explanation:..hi its me back again have a great day and burn it (pls mark me brainliest)
Explain how the processes of sedimentary rock formation change the geosphere.
Sorry, I don't know.
I would suggest asking any trusted adults or your teachers.
Which of the following factors has the greatest effect on blood pressure?
blood volume
blood pH
blood oxygen levels
blood glucose levels
Answer:
Blood oxygen levels I think I'm not sure
How did Mendel do to pollinate the pea plants?
what is it called if a large mass of rocks is sliding downa slope
Answer: rock avalanche
Explanation: hope it helps
In what form does oxygen travel in the blood? What form
of carbon dioxide?
Answer:
Oxygen is carried both physically dissolved in the blood and chemically combined to hemoglobin. Carbon dioxide is carried physically dissolved in the blood, chemically combined to blood proteins as carbamino compounds, and as bicarbonate.
Explanation: hope this helped :)
Does photosynthesis occur in all plant cells?
Answer:
No- not all, but most.
Explanation:
The newly discovered plant — named Gastrodia kuroshimensis — occurs in the dark understory of forests where little light penetrates. So instead of using sunlight or photosynthesis to generate nutrients, the plant parasitizes the fungi in the forest soil for its daily dose of nutrition.
Answer:
No Not all, but most
Explanation:
A flower population that originally ranges from white to red becoming mostly pink over several generations is an example of what type of selection
A flower population that originally ranges from white to red becoming mostly pink over several generations is an example of stablizing.
What is an example of disruptive selection?Light-colored oysters would blend into the rocks in the shallows, and the darkest would blend better into the shadows.
The ones in the intermediate range would show up against either backdrop, offering those oysters no advantage and make them easily.
Thus, several generations is an example of stablizing.
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Small molecules that allow communication between cells of the immune system and regulate the growth or activation of white blood cells are known as
Which one is it? 1, 2, 3, or 4?
Answer:
2 all living things need organ systems I am in 7th grade and I know this
Explanation:
If a plant cell completes the cell cycle in 24 hours, how many plants cells will be produced in a week?
(With explanation)
Answer:
The correct answer is 128 cells
Explanation:
The explanation is in the picture there
What type of muscle controls leg movement?
A) striated
B) cardiac
C) smooth