Answer:
Angiosperms exhibit a vast array of reproducive strategies.
The evolution of several physical and genetic barriers to self-fertilization or fertilization among closely related individuals is thus widespread in angiosperms. A major genetic barrier to self-fertilization is self-incompatibility (SI), which allows female reprductive cells to discriminate between "self" and "non-self" pollen, and specifically reject self pollen.
Explanation:
Two unique reproductive adaptations of angiosperms (flowering plants) are flowers and fruits.
Angiosperms have evolved specialized reproductive structures called flowers. Flowers are composed of several parts, including the male reproductive organs (stamens) and the female reproductive organs (carpels).
They produce fruits, which are structures that develop from the ovary after fertilization. Fruits serve as protective coverings for seeds and aid in their dispersal. They can take various forms, including fleshy fruits like apples and berries, as well as dry fruits like nuts and capsules.
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Can someone help me
if an astronaut has mass 100 kilometers , what is his weight on earth where his acceleration due to gravity is 9.8m/s2
Answer:
if his mass is 100 Kg his weight would be 100 Kg on earth (or anytime gravity=9.8 m/s^2
Russell and Marco are trying to lift their friend Colin onto a tree branch. Russell is pushing
Colin upward with a force of 250'N. Marco is pushing Colin upward with a force of 310 N.
Earth's gravity is pulling Colin downward with a force of 520 N.
Assume all other forces on Colin are balanced. Which statement describes the forces on
Colin?
The forces are balanced, so there is no net force on Colin.
The forces are unbalanced, so there is a net force on Colin.
Answer:
Unbalanced
Explanation:
The forces acting upon Colin, his friends pushing and gravity, are unbalanced
________ cannot be created or destroyed. It can only be transformed (from one type of energy to another, such as chemical energy to electrical energy when a toy uses a battery) or transferred (from one place to another, such as a hot coffee mug to your hand).
Answer:
energy
Explanation:
Which brain structure is most responsible for interacting with and controlling the endocrine system?.
Explanation:
The hypothalamus abstains or releases the hormones necessary for endocrine system...
Mr. D asked four students to identify characteristics of organisms in the kingdom Eubacteria. Which student
correctly identified two characteristics of Eubacteria?
Student Cell Organization Nucleus Present
Glenda single-celled
Sam single-celled
yes
Tremica multicellular
no
Thurman multicellular
yes
no
Answer:
The student who correctly identified the two characteristics of Eubacteria was Glenda (option A).
Explanation:
Eubacteria are unicellular prokaryotic microorganisms, provided with membrane and cell wall.
One of the distinctive characteristics of Eubacteria is their inability to associate and form tissues, as eukaryotic bacteria do, so they are unicellular organisms. In addition, they lack a nucleus, their genetic information is dispersed in the cytosol and they do not possess most of the organelles.
Eubacteria can be found on any surface and some of them can be considered harmful to living beings.
Other options:
None of the other students were able to identify these two characteristics of the Eubacteria.
Pls help dont type random answers for the Points PLS
From the list below, select all of the following that are categories of drugs.
stimulants
depressants
street drugs
aspirin
narcotics
hallucinogens
Answer:
Street Drugs, Aspirin, Hallucinogens, Narcotics, Depressants
Explanation:
WILL GIVE BRAINLIEST!!!!!!
Hermit crabs are not able to grow a shell to protect their soft bodies. Hermit crabs find the empty shells of gastropods trying them out until they find a perfect fit.
What is the relationship between hermit crabs and gastropods?
Answer:
Look below
Explanation:
Basically, the relationship between hermit crabs and gastropods is that when a gastropod dies, the hermit crabs will use their empty shells as their new home until they don't fir inside of it anymore.
Hope this helps :)
A bright red coloration would be most beneficial adaptation for insects that live in the grass Question 3 options: True False.
No, a bright red coloration would not be the beneficial adaptation for insects that live in the grass.
What is adaptation?Adaptation is a process of change to adapt the body according to the environment to better the living.
In adaptation, any body feature or part changes to better function in the environment.
If a beetle will adapt to red color that live in the grass, it will be easily seen by predators.
It should be colored a color that mix with green color and cant be easily recognized.
Thus, the statement is false.
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what is saliva made from explain:
Answer:
ariety of electrolytes, including sodium, potassium, calcium, magnesium, bicarbonate, and phosphates. Also found in saliva are immunoglobulins, proteins, enzymes, mucins, and nitrogenous products, such as urea and ammonia.
Explanation:
from google
Answer:
It's made up of mostly water plus the following:
Explanation:
a variety of electrolytes, including sodium, potassium, calcium, magnesium, bicarbonate, and phosphates. Immunoglobulins, proteins, enzymes, mucins, and nitrogenous products, such as urea and ammonia are also found in Saliva.
What is the preparation phase of mitosis called?
It’s called a ‘Prophase’.
During photosynthesis charged electrons move through a chain of proteins called
I think it's lights-dependent reaction
Explanation:
Because the light dependent reaction use light energy to make two molecules needed for the next stage of photosynthesis: the energy storage molecule ATP and the reduced electron carrier nadph in Plants, the light reaction take place in the thylakoid membranes of organelles has called chloroplast.
What is the net energetic cost of converting two pyruvate to one glucose by gluconeogenesis in ATP equivalents
Answer:
6
Explanation:
This layer exists in the Tropical Rain Forest but not the Temperate Deciduous Forest.
Answer:
The emergent layer is unique to tropical rainforests
Explanation:
Tropical rainforests are rainforests general found in areas around the world in which there is no dry season. Each month in these regions has an average precipitation of at least 60 mm.
Temperate Deciduous Forest exists in temperate regions.
The major difference between the tropical rain forest and the temperate deciduous forest is the presence of an emergent layer in the tropical rain forest.
The emergent layer of a tropical rain forest is characterized by a small number of very large trees. These trees mostly grow above the height of the general canopy layer.
Photosynthesis is vital for maintaining levels of atmospheric oxygen. please select the best answer from the choices provided t f
Photosynthesis is a key determining process to regulate the level of atmospheric oxygen. This statement is true.
What do you mean by Photosynthesis?Photosynthesis may be defined as a process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.
Without the process of photosynthesis, the evolution of oxygen can not be imagined. Photosynthesis takes carbon dioxide from the atmosphere, and in respect of this oxygen is liberated in our surroundings.
Therefore, Photosynthesis is a key determining process to regulate the level of atmospheric oxygen.
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Rosa drew a flow chart of the carbon cycle. Flow chart of the carbon cycle with 4 boxes connected by arrows. Box 1: carbon dioxide in the atmosphere. Box 2: X. Box 3: consumers eat producers. Box 4: Y. The arrow that follows box 4 connects to box 1. Which labels best complete the flow chart?
Answer:
(a) X: Producers undergo photosynthesis. Y: Decomposers return carbon to the soil and release waste.
Explanation:
(a) X: Producers undergo photosynthesis. Y: Decomposers return carbon to the soil and release waste.
(b) X: Decomposers return carbon to the soil and release waste. Y: Producers undergo photosynthesis.
(c) X: Decomposers take in carbon dioxide. Y: Producers absorb carbon through their roots.
(d)X: Producers absorb carbon through their roots. Y: Decomposers take in carbon dioxide.
Box 2 (X) would be the process through which producers fix carbon dioxide to produce their own food, the carbohydrate. The process is otherwise known as photosynthesis and can be represented by the following equation:
[tex]6CO_2 + 6H_20 --> C_6H_1_2O_6 + 6O_2[/tex]
Box 4 (Y) would be the process of decomposition. Both producers and consumers eventually die and decompose in the soil. During this process, some of the carbon returns to the soil as organic matters while the process of microbial decomposition releases carbon dioxide into the atmosphere.
The correct option would be (a).
Answer:
a
Explanation:
Why is the having of chromosomes essential for sexual reproduction?
Answer:
Because meiosis creates cells that are destined to become gametes
Explanation:
What three types of atoms are in both carbohydrates and lipids?
Answer:
Carbon, hydrogen and oxygen.
Explanation:
1.
Which of the following substances is not a greenhouse gas?
nitrogen
carbon dioxide
methane
water vapor
2.
What are the main characteristics of a tropical climate?
hot and dry
cold and dry
hot and wet
cold and wet
3.
Clarissa and her friends go to a local pool to cool off during the summer. Classify this type of water use.
public
industrial
residential
agricultural
4.
Which choice is not a primary cause for deforestation?
need for agricultural land
introduction of non-native species
timber for building
mineral extraction
5.
What evidence of climate change is caused by glaciers melting?
glacier retreat
rising temperatures
rising sea level
extreme weather events
6.
Which atmospheric molecule is helpful when it is high in the atmosphere and blocks UV radiation but is harmful in the lower atmosphere where people can breathe it in?
nitrous oxide
carbon dioxide
ozone
sulfuric acid
7.
Why do scientists believe Earth’s climate is changing?
There is an increase in the amount of solar energy in the atmosphere.
There is a decrease in the amount of greenhouse gases in the atmosphere.
There is an increase in the number of particulates in the atmosphere.
There is an increase in the amount of greenhouse gases in the atmosphere.
8.
Which of the following is not a way to reduce personal water consumption?
taking shorter showers
eating less meat and dairy
throwing away old appliances
running the dishwasher when it is full
9.
Identify the effect of climate change that will not affect animals.
changing the ratio of male to female births
disease rates increase
disruptions in the food web
changing migration patterns
10.
What are the main characteristics of a polar climate?
cold and wet
warm and wet
cold and dry
hot and dry
Answer:
The answer is nitrogen
Explanation:
Which of the following substances is not a greenhouse gas?
Neither nitric oxide nor nitrogen dioxide are greenhouse gases, although they are only important in the creation of a greenhouse gas but nitrogen is not a greenhouse gas.
How is the mitochondria and a power plant alike
Answer:
The mitochondira is the "powerhouse" of the cell, it produces energy for the cell like powerplants produce energy for the city.
Explanation:
Precipitation falls to the ground and eventually ends up in the ocean. Which
of the following is the most direct way for the water to get from the soil to the
ocean?
O A. By entering an open watershed
O B. By refracting
O C. By evaporating
O D. By recharging a closed aquifer
Answer:A.By entering an open watershed
Explanation:
(APEX)
HELP ME PLEASE IS URGENT
What is an animal cell?
25 Points. Please Help
What is the average height of the grass in trial C?
A. 1.87
B. 3.77
C. 0.94
D. 1.26
Answer:
[B] 3.77
Explanation:
Base on trial C (orange) 0-5.
It half way through 0 - 5.
Hence, You can infer than it higher than 1 or 2 Hence, the best answer is 3.77
[RevyBreeze]
Questlon 23 of 25
What is work?
O A. The product of a force moving something over a distance
B. The total amount of time it takes to move something
O C. The amount of force applied over time
D. The amount of power used
A radio wave travels through space with a frequency of 2 x 104 Hz. If the speed of the radio wave is 3 x 108 m/s,
what is the wavelength of this wave?
O 6 x 10^12 m
O 1 x 10^4 m
O 6.7 x 10^-4 m
O 1.5 x 10^4 m
The wavelength of the radio wave is [tex]1.5 * 10^4[/tex] meters.
The wavelength of a wave is the distance between two adjacent points that are in phase, or in the same phase as their cycles on the wave. For example, the distance between two successive peaks or troughs of a sine wave is known as a wavelength.
A wave's speed, wavelength, and frequency can be calculated using the following formula:
Wavelength = speed / frequency
Substituting the given values:
Wavelength = [tex]3 * 10^8 m/s / 2 *10^4 Hz[/tex]
Wavelength = 15,000 meters or 1.5 x [tex]10^4[/tex]meters
So, the correct option is D.
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A school bus transporting students to school is an example of
a
potential energy because it has the ability to take the students to school
Ob
kinetic energy because it has the ability to take the students to school
Ос
potential energy because it is taking the students to school
O d
kinetic energy because it is taking the students to school
Answer:
2.kinetic energy because it has the ability to take the students to school.
Explanation:
Energy of a given system due to the virtue of the motion of the given system is known as kinetic energy of the system
now we know that
so kinetic energy depends upon mass of the system and the velocity of the system.
So here since bus is in motion and moving towards the school so the bus along with all the children must have kinetic energy in it
So here correct answer would be
2.kinetic energy because it has the ability to take the students to school.
How can you make a potentially renewable resource sustainable?
Answer:
You will have to find many different methods in which the resource is most useful. Some resources may be useful in one place and some may be useful in another its all about how you use the resource.
Explanation:
Which of the following describe a way climate change makes droughts more
extreme?
Choose the three correct answers. (1 point)
-rain instead of snowfall
-storms increase in energy
-increased evaporation
-increased snowmelt
Climate change has the tendency to make droughts more extreme by increasing the rate of evaporation from land surfaces.
What is climate change?Climate change refers to the unpredictability of climate away from what used to be considered normal.
Climate change is brought about by global warming, an increase in the annual global temperature of the globe.
Climate change has the tendency to make droughts more extreme in that increased temperature leads to an increase in the rate of evaporation from ground surfaces.
Droughts are caused by the absence of water, the drier a place is, the more the drought.
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Answer:
Increased Evaporation
Rain Instead Of Snowfall
Increased Snowmelt
Explanation: If all of the answers are correct, could you give me brainliest please?
Fernando is an engineer at an amusement park who is experimenting with changes to the setup for a magnetic roller coaster ride. In one ride, there are two identical roller coaster cars (red and yellow) that start on opposite sides of a large magnet located in the center of a station. He moves both cars, so each car ends up one space farther away from the large magnet.
How did the potential energy of the two cars change? Did the potential energy of one car change more than the other? Why do you think
I think that the potential energy of the cars will go down because the cars are moving farther away from the big magnet. Since the pols of the cars and big magnet are opposite and not the same they would want to attract if they got close to the big magnet, but since Fernando is pulling the carts away they loose that potential energy. I also think that the red cart changed more than the yellow cart because it is closer to the magnet which can have a lot of potential energy and he is now bringing the cart away from it. In conclusion, I think the red cart had a greater change in potential energy and the two cars changed in potential energy too.
which of the following contains only biotic factors
a- temperature, pH, rainfall
b- algae, shrimp, humidity
c- frog, climate, insect
d- ant, grass, snail
Answer:
option : d
Explanation:
A biotic factor is a living organism
A biotic factor (also called a biotic component) is a living thing that affects other things ant, grass and snail.
What are producers?Producers are any kind of green plant. It makes it food by taking sunlight and using the energy to make sugar.
The plant uses this sugar, also called glucose to make many things, such as wood, leaves, roots, and bark.
Thus, ants, grass and snail is a biotic factors (also called a biotic components) in a living thing.
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