darwin's experiments are just one way to study phototropism. a student wants to investigate the effects of phototropism in bean plants. she places a light source above one plant, at a forty-five degree angle to another, and at a ninety-degree angle from the third.
What is her independent variable?
What is a hypothesis she might write for her experiment?
Thank you
Answer:
Independent variable: Angle or direction of light
Hypothesis: IF the light is placed on the plant at a particular angle, THEN the plants will grow in that direction
Explanation:
In an experiment, the HYPOTHESIS is a testable explanation given to explain an observed problem or to answer a question. According to this experiment,
a student wants to investigate the effects of phototropism in bean plants i.e. how light affects the direction of plant growth. The scientific question is "How does light affect the direction which plant grows?". Therefore, a possible hypothesis will be:
IF the light is placed at a particular angle or direction, THEN the plants will grow in the direction of that light source.
- The independent variable is the variable that the experimenter changes or manipulates in order to effect a measurable response (direction of growth). In this experiment, the DIRECTION OR ANGLE OF THE LIGHT SOURCE IS THE INDEPENDENT VARIABLE.
One property that all particles of
matter have in common is they
a. never move in solids.
b. only move in gases.
c. move constantly.
d. None of the above
An orchid is found in the lower canopy of a tropical rain forest. It does not grow from the ground but grows on a tree. Therefore , an orchid is an :
Answer:
Epiphyte
Explanation:
The correct answer would be an epiphyte.
An epiphyte is a plant that grows on another plant for support only. Epiphytic plants are capable of manufacturing its own food using photosynthesis and perform every other life processes independently but only depend on another plant for anchorage. All their material requirements such as water and minerals are derived from the air surrounding them.
Mutations are only passed to offspring when they occur in what special types of cells?
What are some components of a chemical reaction?
I need help please !!!!!!!!!!!!
Answer:
with??
Explanation:
Prompt:
The current model of the plasma membrane allows for a better understanding of its structure and how materials are transported across the membrane. It also allows for a better understanding of the methods that cells use to signal each other.
A) Outline the three stages of cell signaling.
B) The aldosterone hormone is released by the adrenal gland. Explain the target cells signal transduction pathway response to aldosterone.
Note: Please help Im on a time crunch!! <3
Answer:
A. The process of cell signaling includes three stages: reception, transduction, and response. in reception, a chemical signal binds to a cellular protein, typically at the cell's surface. In transduction, binding leads to a change in the receptor that triggers a series of changes along a signal - transduction pathway. In response, the transduced signal triggers a specific cellular activity.
B. When aldosterone hormone is released by the adrenal gland: first, the Endocrine System secretes hormones into the blood and hormones are transported within the blood and are distributed to target cells throughout the body, then any cell in the body with a receptor for the hormone is targeted, there is a relatively slo reaction time which could range from seconds to minutes to hours, the effect of the hormone released is usually felt throughout the body but the response is long - lasting from minutes to days to weeks and my continue after the stimulus is removed.
Explanation:
When a molecule of CARBON DIOXIDE travels out of a lung cell to be
exhaled, the carbon dioxide moves with the concentration gradient using
no energy in the process. What kind of cell transport is this? *
O
Active Transport
O Exocytosis
O Diffusion
O Osmosis
Answer:
The answer would be Diffusion
What occurs after a natural process such as a flood?
Which of the following is possible when a populations carrying capacity is reached or exceeded?
population growth will slowly level off
Population continues to grow exponentially past the carrying capacity
population growth will crash
Carrying capacity of the ecosystem is reduced
Answer: population growth will crash
Explanation: Every organism follows a growth curve to complete its life cycle. When the organism exceeds its carrying capacity in the environment, then the population crashes.
There are mechanism present in the environment to prevent growth after a certain extent of time. Example: Plants only have the ability to regenerate after being crashed but other organism lack this property.
After a certain extent, population crashes along with its environment.
TRUST ME!!! I'm Brainly and the answer is correct in Edge!!! :)
i need help with this question as soon as possible
Answer:
tails
Explanation:
I hope this helps
What three sources of ATP does your body use during a long aerobic exercise session?
Answer:
ATP already stored in the body, ATP made by fermentation, and cellular respiration. Cellular respiration is able to extract about 38% of the potential energy from glucose.
Explanation:
When discussing Newton’s laws of motion, which terms do people most likely use when talking about Newton’s third law of motion?
Answer:
C. action and reaction.
Hope it works!
Explanation:
You get out of school and walk north for 20 minutes. You travel 1.6 km. What is your average velocity?
Answer:
1.6
Explanation:
What is the name of the site on a chloroplast where half of the reactions in
photosynthesis occur?
Answer:
thylakoid
Explanation:
The light reactions take place in the thylakoid. There, water (H2O) is oxidized, and oxygen (O2) is released. The electrons that freed from the water are transferred to ATP and NADPH.
environmental scientists collect air samples so they can test the quality of the air, they start with rigid metal containers that are completely empty the air has been pumped out of them what happens to the pressure inside the container and the volume of the container as air enters it?
Answer:
Here's this. Let me know if that helps :)
Explanation:
The sampling procedures must be designed so that samples of the actual dust concentrations are collected accurately and consistently and reflect the concentrations of dust at the place and time of sampling. Sufficient number of 6-hour area samples in each distinct work area of the plant should be collected at locations which provide representative samples of air to which the worker is exposed. In order to avoid filter overloading, sampling time may be shortened when sampling in dusty areas. Samples in each work area should be gathered simultaneously or sequentially during a normal operating period. The daily time-weighted average (TWA) exposure of each worker can then be determined by using the following formula:
As the air which is pumped out of the empty rigid metal containers the pressure inside the container increases as well as the volume of empty container increases to occupy the space.
What are pressure and volume changes?The container experiences changes in the amount of pressure and volume, when the matter is added or removed from a container. An increase is experienced when something is added to the container.
The increase in volume and pressure are observed because as the air is pumped out of the container it tries to spread out and volume increases as the particles starts to occupy the empty space present in the container. With the particles occupying volume of container, the air particles try to move faster and as a result hits the container harder which lead to increase in the pressure inside the container, and the volume of air pumped out of the container.
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fish live under the water
I need help on this please help
dna, genes, animo, to acids
Is the amount of water on our planet is the same today as it was 5,000 years ago.
Answer:
Yes
Explanation:
Matter is not created nor destroyed (it never disappears) EVER. Therefore, the answer to your question is YES. :3
Which of the following is not part of Earth's physical systems? *
A. Ecosphere
B. Hydrosphere
C. Biosphere
D. Atmosphere
answer
ecosphere that is the answer
answer
will give brainllest if right
Answer:
Summer
Explanation:
The Northern hemisphere is facing the sun completely, so summer is right.
I hope this right!
write the procedure to observe human cheek cell
Answer:
To observe the cheek cell,
Take a tooth pick use its blunt side to scrap inside the mouth. You will see some deposition on the blunt side of tooth pick, make a smear on the clean slide in the center using that tooth pick. Add a drop of methylene blue solution and place a coverslip, make sure that bubbles are avoided i.e. coverslip should be placed in the inclined manner. Remove the excess solution and observe it under the microscope first under 4X and then under 10X.Observation:
The cells observed are squamous epithelial cells. The small blue dots seen inside will be the bacteria from our teeth and mouth.What are groups of organisms of the same species that interact?
What is the answer ??
Answer:
take a pick closer
How do changes in environmental factors affect the predation habits of the blue heron?
Explanation:
blue heron feed on eggs, provided by Eagles. however, eagles feed on adult blue herons, their eggs, environmental factors are; changes in weather, they feed on tadpoles and frogs during a wet spring/summer..dry conditions create, more lizards, snakes,etc., which they also feed on for survival.. adaptation 2 conditions create opportunities for predators and prey...
During spring/wet summer Blue herons feed on Frogs and Tadpoles while they predate/feed on lizards and snakes when the season becomes drier.
The predation habits of the Blue heron is affected by the changes in weather conditions year round, Blue herons can predate/feed on different preys such as ; eagle eggs, lizards, snakes and tadpoles.
The type of prey the Blue heron feeds on is solely dependent on environmental factors at each time of the year. Blue herons are found mainly on the shores of water bodies.
Hence the changes in environmental factors makes the Blue heron to feed on frogs during spring/ wet summer and to feed on lizards when the season becomes drier.
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Please answer fast due in 30 mins. This is anatomy and physiology.
These are the questions i have to answer
Group of answer choices
1) arrector pili
2) artery
3) dermis
4) epidermis
5) hair follicle
6) hair shaft
7) hypodermis
8) Meissner's corpuscle
9) nerve endings
10) Pacinian corpuscle
11) papillary layer
12) pore
13) sebaceous gland
14) sweat gland
15) vein
Here are each of the answers
A) Upper layer of skin composed of mostly dead cells.
B) Produces hair.
C) Dead part of the hair that projects from the surface.
D) Has fingerlike projections that penetrate into epidermis to provide nutrients.
E) Thick layer of skin that contain nerves; blood vessels.
F) Muscle that pulls hair upright .
G) Carries blood toward the skin.
H) Anchors the skin to underlying organs.
I) Opening of a sweat duct.
J) Nerve receptor that detects touch.
K) Carries blood away from the skin.
L) Produces sweat.
M) Produces sebum.
N) Receptor that detects deep pressure.
O) Detect pain.
Answer:
Explanation:
I hope you get this in time
Which property of water helps to moderate temperature in organisms?
'
List the order of event from oldest to youngest.
a)K, I, I, H, P, L, M, N, O, Q
b)K, J, IH, L, M, NO,P,Q
c)Q, O, N, M, L, P, H, I, J, K
d)Q, P, O, N, M, L, H, I, J, K
Answer:
The answer is D.
Explanation:
Which of the following is the best example of a keystone species?
А
Sea otter
B
Sea urchin
с
Spotted owl
D
Snail darter
E
Condor
The best example of a keystone species from the available answer choices is:
А . Sea otterA keystone species is an important pointer in any ecosystem that helps make sure that the ecosystem doesn't go extinct. They have low functional redundancy which means that if there is a decline in the diversity of the ecosystem, then the traits are lost.A sea otter is a good example of a keystone species because they are high on the food chain in the marine ecosystem as they are the predators and help reduce the number of sea urchins who eat the kelp.This action of the sea otter ensures their survival in the ecosystem.Therefore, the correct answer is option ARead more here:
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In which trophic level do we find the producers?
Answer:
Level 1...Plants and algae make their own food and Plants and algae make their own food and are called producers.
Answer:
The base of the pyramid
Explanation:
An example of which is: grass