Answer:
The pressure differences on either side of the valve.
Explanation:
The heart valves open and close passively because of pressure differences on either side of the valve. When pressure is greater behind the valve, the leaflets are blown open and the blood flows through the valve. However, when pressure is greater in front of the valve, the leaflets snap shut and blood flow is stopped.
Hope this helps!
have a blessed day
9th Grade biology question Please help me
Answer:
a
Explanation:
Answer:
(A)
Explanation:
Simple osmotic pressure will make the water enter the red blood cell thereby making it first lose its biconcave shape, then swell up to a rounder spherical shape and then burst as Kevin Cooke and Andrew Lister have suggested. The process is called hemolysis.
Identify the type of force that is important in forming atoms, stars and planets.
Answer: First, gravity is the force that pulls us to the surface of the Earth, keeps the planets in orbit around the Sun and causes the formation of planets, stars and galaxies. ... The Strong Nuclear Force binds the nucleus of an atom together.
Explanation:
i need help please i don’t know what it is
Answer:
It should be vacuole!
Explanation:
Hope this helps!
1. The blood vessel that carries deoxygenated blood to the heart.
A. aorta
B. pulmonary vein
C. pulmonary artery
D. vena cava
which sequence is correct about the circulation process?
A. deoxygenated blood > left heart > aorta > organs > oxygenated blood > vena cava .> right heart
B. oxygenated blood > right heart > lungs > deoxygentaed blood > vena cava > left heart > aorta > organs
C. deoxygenated blood > aorta > left heart > lungs > oxygenated blood > right heart > vena cava > organs
D. oxygenated blood > left heart > aorta > organs > deoxygenated blood > vena cava > left heart
Which of the following is NOT a function of valves?
A. To allow blood in the big arteries to flow out and not back into the heart.
B. To filter the the blood cells as they pass through the vessels.
C. To let blood flow in one direction, towards the heart in veins.
D. To allow blood flow from the upper chamber to the lower chamber of the heart.
Answer
The first one is vena cava.
Not sure abt the 2nd and 3rd. Sry
Answer:
1. D
2. A
3. A
Explanation:
hope it's helpful po
brainlest po
Question 2 (1 point)
Which of the following statements is true about photosynthesis and cellular
respiration?
Photosynthesis occurs in plants; cellular respiration occurs in animals.
Both processes are carried out in the same location in the cell.
The chemical equations for the processes are opposite of each other.
The steps in both processes are very similar to each other.
Answer:
Photosynthesis occurs in plants;cellular respiration occurs in animals
HELPPPPPPPPPPPPPPPP
organelle
DEFINITION:
Answer:
They are the organs of the cells
Explanation:
the end
Answer:
Organelles are specialized structures that perform various jobs inside cells. The term literally means “little organs.” In the same way organs, such as the heart, liver, stomach, and kidneys, serve specific functions to keep an organism alive, organelles serve specific functions to keep a cell alive
Explanation:
Please help me with 11-12 thank you so much
11. Flames consume and use energy, require oxygen, and moves through the environment.
12. Although it consumes oxygen and produces carbon dioxide like living things, it is nonliving because it has no body or structured cell system.
What is the difference between guttation and dew
Answer:
Dew is atmospheric moisture condensing on colder surfaces, and is pure water. Guttation is moisture secreted from within the plant itself, and contains xylem sap. Guttation allows for secretion through the edges of the plant.
answer asap asap!
bio
QUESTION: What are the building blocks of all organisms?
ANSWER:
Answer:
Cells
Explanation:
Answer:
Cells
Explanation:
Organisms are created by different types of tissues. These are composed of cells. Animals are made of animal cells which are round, and plants are made of plant cells which are rectangular and have cell walls.
Compare the food chain and the food web below. Explain how biodiversity makes one of these more stable than the other. Be sure to use examples from the diagrams. Hint: How does biodiversity in an ecosystem increase organisms’ chances of survival?
(sorry I didn't know what subject to put)
Answer:
A food chain is a linear flow of energy and nutrients from one organisim to another .
A food web can be termed as the combination of many different food chains and the relationship that exists between each organisim
For instance :
FOOD CHAIN FOOD WEB
. A linear pathway . A multitude of networks
showing the flow showing the flew of energy
of energy
. A organisim of higher . An organisim of higher
level trophic feeds on a specifi- trophic level has access
c organisim of lower trophic level. to more members of a
lower trophic level.
. Has no effect on the adaptability
and compatitiveness of organisims . . Has a role in impro-
ving the adaptability
and competitiveness of an
organisim .
hope its helpful plz mark me brainliest . Good luck ;)
What happens to the oxygen
that is formed when water molecules
are split during photolysis
Answer:
Since photolysis is the splitting of molecules by light, the oxygen that is formed mostly supplies the oxygen in our atmosphere.
Colony collapse disorder is a natural phenomenon in which the majority of worker honeybees—bees that collect food for the hive—die at the same time. If several hives in a region experience this phenomenon, how could it affect the life cycle of flowering plants in the region?
Answer:
A decrease in honeybees can lead to fewer bees pollinating flowers, which could decrease the chances of flowering plants producing offspring.
Explanation:
Edmentum
How does a person become immune against a disease?
Look at each picture. Then write in the term that best completes each sentence:
cross-pollination dominant
genetic information
recessive
1. Offspring cells are
identical to parent
cells because they
contain identical ____
2. The pea plant in
this picture is polli-
nating another
plant. This process is
called ______
3. In pea plants, the
allele for purple
flower color is ______
4. Pea plants with
white flowers receive
two __________
over the allele for
white flower color.
alleles for flower
color from parents.
Answer:
the answer is C. The plant received both alleles from both the parents.
Explanation:
Which is a chemical property?
boiling
boiling
burning
burning
freezing
freezing
melting
Can someone help me with this question?:
what general equation describes cellular respiration? Indicate whether this is a summary of the process or an ordinary chemical equation.
Thank you!
Answer:
C 6 H 12 O 6 + 6 O 2 --> 6 CO 2 + 6 H 2 O + ATP is the complete balanced chemical formula for cellular respiration.
Explanation:
Bears are known to hibernate during the winter and give birth to their cubs 1 point
in the spring. This is made possible because bears mate in the spring and
after a brief moment of embryo development, the embryo stops
development for several months. If the mother has enough stored energy
to last her and her babies through the winter, the embryo will implant and
continue to develop into a baby. What organic molecule would allow the
mother to have energy to allow the embryo to grow through the winter?
Water molecules because it is used during osmosis
Monomers because they are smaller units that makes up polymers
Proteins because it gives the body support
Lipids because lipids stores energy
Answer:
ufuddsiodpfofiffopOI
Explanation:
someone write me a little intro on water hyacinth please
Answer:
Hello! Today I will tell you somethings about water hyacinth, we will start with what does it do? Well,
Water hyacinth has a variety of negative impacts once introduced into a freshwater environment. it forms dense, impenetrable mats which clog waterways, making boating, fishing and almost all other water activities, impossible. It also reduces biodiversity by crowding out native plants at the water's surface and below.
Well that makes it seem bad is it?
(you will answer this on your own with other things you think someone would ask if you need more info just tell me, thanks!)
Explanation:
How is an aponeurosis functionally similar to a tendon?
Answer:
An aponeurosis is functionally similar to a tendon because, like a tendon, it is connective tissue that attaches muscles to bones.
how to do this question plz answer
This is because mitochondria produce ATP during aerobic respiration and ATP is needed for muscle to contract. Muscles cells contain more mitochondria because they have to release large amount of energy quickly for movement.
Helpppp PLS FAST I will mark as brainlist!
What are air plants?
Why don’t they need soil to grow?
How can this science help us cobalt real life problems ?
Answer:
1. Air plants are part of the Bromeliad family, air plants are epiphytes — plants that attach themselves to other plants for support, without relying on the host to thrive.
2. They absorb moisture and nutrients through their leaves, not their roots, which they use only to anchor themselves to other plants or objects. Since air plants don't absorb their nutrients through their roots, they can't be planted in the soil.
3. The internal structure and anatomy of Tillandsia have adapted to survive on varied hosts both alive and not. Their leaves are able to pull moisture from the air more efficiently while some have developed a camel-like ability to store water and survive in areas prone to drought. Being up in trees or on rocky cliffs protects these plants from damage done by foraging animals, flooding or erosion on the ground.
Explanation:
Epiphytic plants can be used to determine the elemental composition of the air and soil in which they grow, cycle nitrogen, affect water retention within the rainforest, and house many resources for various plants and animals.
Through the analysis of epiphytes, biologists can determine changes in air and soil composition over time. Air pollution in the rainforest can be monitored by the use of air plants. By monitoring how mosses and lichens respond to different air pollutants, especially heavy metals, the effect that the toxins have on the environment can be determined In the rainforest, epiphytes can be placed in areas where there is ecological damage to determine if nearby pollutants are affecting the health of the forest and additionally play a role in nitrogen cycling.
5. Juan’s cell phone company charges $35 a month for the phone service plus $0.50 for each text message. How many text messages does Juan send in a month if his bill was $52?
Answer:
34
Explanation:
Total Cost = Fixed Charge + 0.50 * number of text messages
Total Cost = 52 dollars.
text Messages = x
Fixed charge = 35 dollars.
Equation
Total Cost = Fixed Charge + number of text message * 0.50
Solution
52 = 35 + 0.50 * x Subtract 35 from both sides
52 - 35 = 35-35 + 0.50x Combine
17 = 0.50x Divide by 0.50
17/0,50 = 0.50*x/0.50
x = 34 text messages
what three elements are found in chlorofluorocarbons
Answer:
Carbon, chlorine, and fluorine.
Explanation:
An idea that has been tested Widely,  is supported by extensive evidence, and is accepted by most scientist in a particular field of study, is called a(n)?
A. Hypothesis
B. Scientific law
C. Scientific variable
D. Theory
Answer:
D. Theory
Explanation:
Which of the following describes flat inland areas, rich and fertile due to the constant replenishing of nutrients from decomposing grasses?
Estuary
Taiga
Temperate grassland
Tropical rainforest
Answer:
Taiga ,temperate grassland
Temperate grasslands are important biomes characterized by their fertility. The correct option is C. Temperate grassland are flat inland areas, rich and fertile due to the constant replenishing of nutrients from decomposing grasses.
BiomesBiomes are defined according to the vegetation structure and the other forms of life inhabiting them.Their location is determines by the climatic condition in each regions.Temperate grassland is one of the worlds biomes.Temperate grasslandsOpen plane areas covered by herbal vegetation, with a few deciduous woody species. Grasses dominate temperate grasslands.Distributed in the northern and the southern hemispheres.
They are severely affected by fires and tornados.
Fires, droughts, and grazing by animals prevent different woody species from establishing.
Temperature and rains in these regions widely vary with seasons.
The high levels of precipitation and humidity are characteristic of the biome.
Climatic conditions drove grass species to develop large roots to establish to the ground. This characteristic helps to reduce erosion and to keep soil humidity.The soils characterizes for being unusually rich, fertile, and deep.
Temperate grassland are then flat inland areas, rich and fertile due to the constant replenishing of nutrients from decomposing grasses. Option C is correct.
------------------
You will learn more about temperate grasslands at
https://brainly.com/question/25885848
https://brainly.com/question/17864454
-----------------------------------
Which group of organisms obtains energy by breaking down waste and dead organisms?
consumers
decomposers
predators
producers
right answer: decomposers
what is the primary product of the light dependent reactions of photosynthesis?
Answer: Glucose (and also oxygen)
Explanation: Photosynthesis is the process of turning CO2 and H2O in Glucose and oxygen where the chloroplasts use the energy from the sun to rip apart the molecules and rearrange them into glucose, a useable form of energy, and oxygen, a bi product that gets released into the atmosphere.
Michelle was curious about her mother's blood type. Michelle knew that her own blood type was o,
her father's blood type was A, and her two sisters and one brother both also had type A blood. How
could Michelle have type o when everyone else around her seems to have type A blood? Michelle is
really frustrated. Please help her out by making a possible Punnett square showing how this could
happen.
Blood type is determined by the I gene. IAIA and IAi determines A blood type. IBIB and IBi determines B blood type. ii determines 0 blood type. Michelle's mother must at least carry one recessive allele i.
--------------------------------
The blood type is determined by a gene, which is triallelic.
IA dominant over i. The person presents A type of antigens.IB dominant over i. The person presents B type of antigens.IA and IB are codominant. The person presents both types of antigens, A and B.i is the recessive allele. The person does not present any antigen.⇒ H0m0zyg0us dominant individuals IAIA, or heter0zyg0us Individuals IAi, will express the A blood type.
⇒ H0m0zyg0us dominant individuals IBIB, or heter0zyg0us Individuals IBi, will express the B blood type.
⇒ Individuals with h0m0zyg0us recessive genotype, ii will express the 0 blood type.
⇒ Individuals carrying IA and IB alleles will express the AB blood type.
To solve the problem, we will use this information.
We know that
Michelle is blood type 0 Father is blood type ABrother and sister are blood type AMother??⇒ If Michelle is blood type 0, then her genotype is ii. She must have received one recessive allele from her father and one from her mother.
⇒ This suggests that Michelle's father, who is blood type A, is heter0zyg0us IAi. He must have at least one dominant allele IA that determines his phenotype, and one i allele.
⇒ Michelle's brother and sisters are also type A. They might be either h0m0zyg0us dominant IAIA or heter0zyg0us IAi.
⇒ Michelle's mother should have at least one recessive allele i. She could be either IAi or IBi, or ii. There are three possible option for her genotype.
Let us make the Punnet squares to understand it better. We know the genotype of the father, but there are three options for the mother.
Option 1
Cross) father x mother
Parentals) IAi x IAi
Gametes) IA i IA i
Punnett square) IA i
IA IAIA IAi
i IAi ii
F1) 25% of the progeny is expected to be h0m0zyg0us dominant IAIA
50% of the progeny is expected to be heter0zygus IAi
25% of the progeny is expected to be h0m0zyg0us recessive ii
75% of the progeny is expected to be blood type A ⇒ IAIA and IAi ⇒ Sisters and brother
25% of the progeny is expected to be blood tye 0 ⇒ ii ⇒ Michelle
Option 2
Cross) father x mother
Parentals) IAi x IBi
Gametes) IA i IB i
Punnett square) IA i
IB IBIA IBi
i IAi ii
F1) 25% of the progeny is expected to be IAIB
25% of the progeny is expected to be heter0zygus IAi
25% of the progeny is expected to be heter0zygus IBi
25% of the progeny is expected to be h0m0zyg0us recessive ii
25% of the progeny is expected to be blood type AB ⇒ IAIB
25% of the progeny is expected to be blood type A ⇒ IAi ⇒ Sisters and brother
25% of the progeny is expected to be blood type B ⇒ IBi
25% of the progeny is expected to be blood tye 0 ⇒ ii ⇒ Michelle
Option 3
Cross) father x mother
Parentals) IAi x ii
Gametes) IA i i i
Punnett square) IA i
i IAi ii
i IAi ii
F1) 50% of the progeny is expected to be heter0zygus IAi
25% of the progeny is expected to be h0m0zyg0us recessive ii
50% of the progeny is expected to be blood type A ⇒ IAi ⇒ Sisters and brother
50% of the progeny is expected to be blood tye 0 ⇒ ii ⇒ Michelle
Despite the fact we can not determine for sure the mother's genotype, we know that she carries at least one recessive allele, which is why Michelle's blood type is 0.
------------------------------
Related link: https://brainly.com/question/256625?referrer=searchResults
https://brainly.com/question/275815?referrer=searchResults
8
What statement is true about cell walls.
1
Cell walls are present in animal cells
O All cells have cell walls
O Cell walls support, shape, and protection the cell
O In plants, cell walls are made of proteins
Answer:
Although 3 and 4 are great answers, I honestly think the answer is C. Because you can simply define the cell wall as a semi-rigid thick protective structure that surrounds the cell membrane of some types of cells for protection and defining the shape of the cell. The cell membrane alone cannot provide the required rigidity or strength. All living organisms are composed of cells. Cell walls contain only little amount of protein in the cell wall.
Explanation:
Not all cells have a cell wall; the cell wall is a rigid covering that protects the cell, provides structural support, and gives shape to the cell. Cell walls are found in both prokaryotes and eukaryotes, although not all cells have cell walls. Animal cells does not have a cell wall; Cell walls provide support and give shape to plants. Plant cells have chloroplasts, but animal cells do not. Chloroplasts enable plants to perform photosynthesis to make food.