Answer:
Cone-bearing plants have two types of cones: female cones and male cones. Reproduction begins when one of the pollen grains from inside a pollen sac on the male cone floats through the air to the scale of a female cone. A pollen tube then grows from the pollen grain toward the female ovule.
PLS PLS PLS HELP!!!!! hydrogen (H2) and oxygen (O2) to make water (H2O).
a. Write a balanced equation for this reaction. Be sure to show your work. (4 points)
Answer:2H2+O2 gives 2H20
Explanation:
Discuss at least two reasons why windmills are more environmentally friendly for generating electricity than methods such as nuclear, or water power (dams).
Answer:
they use wind to generate it's electricity and also because it doesn't use chemicals that may be harmful to humans and the enviroment also BLACK LIVES MATTER
Explanation:
hope this helps do NOT write black lives matter on your paper
Each cell has a structure that separates the inside of the cell from.the environment. What cell is this?
Answer:
Either the cell wall or the cell membrane.
Explanation:
All cells have cell membranes which line the outside of the cell, and some cells have cell walls, which also line the outside of the cell. Since all cells have cell membranes I am inclined to believe that the correct answer would be cell membranes.
Which part of the DNA structure provides the genetic code for our traits?
Deoxyribose Sugar
Nitrogen Bases
Double Helix
Phosphate
Answer:
Phosphate
\\\\\\\\\\\\\\\\\
Hydrogen bonds can be found between no other molecules except water.
Answer:
Without hydrogen bonds, water molecules would move faster more rapidly, with less input of heat energy, causing the temperature to increase more for each calorie of heat added.
Explanation: This would also greatly reduce the amount of heat energy needed for phase changes from ice to liquid, and from liquid to vapor.
Answer: Not really a question but....Two molecules of water can form a hydrogen bond between them that is to say oxygen-hydrogen bonding; the simplest case, when only two molecules are present, is called the water dimer and is often used as a model system.
Earth is 150 million kilometers from the sun, and the solar "wind" travels at about 400 km/sec. How long does it take particles from a solar storm to reach Earth? (Hint: Time = Distance / Speed. To convert from seconds to hours, divide the time in seconds by 3600.)
Answer:
The correct answer is - 4.34 days.
Explanation:
Given:
Distance from the sun to earth = 150 million kilometer
= 1500,00,000 km
The solar "wind" travels = 400 km/sec
= 400*60*60 km/ hour
= 1440000 km/hour
Then time = distance/speed
time = 1500,00,000 km/1440000 km/hour
time = 104.166666667 hours
time = 104.166666667/24
= 4.34 days.
Which of the following is NOT one of the three types of neurons?
Group of answer choices
Peripheral
Sensory (or Afferent)
Motor (or Efferent)
Interneurons
Answer:
Sensory (or Afferent)
Explanation:
the answer is Peripheral
2. The thread-like chromosomes are spread
throughout the nucleus in the form
Answer:
When the cell is not dividing, the genetic material is loosely dispersed throughout the nucleus in a threadlike form called chromatin.
Explanation:
Chromatin is the thread-like chromosomes spread throughout the nucleus.
What are chromatin and its functions?Eukaryotic cells' nuclei include a combination of macromolecules called chromatin, which is made up of DNA, RNA, and protein. Heterochromatin (condensed) and euchromatin are the two types of chromatin. The main proteins that make up chromatin are termed histones, which act as bases for the DNA to wrap around to form the "bead-like" structures known as nucleosomes.Functions of chromatin:DNA packagingTranscription regulationChromatin and DNA repair
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Please help me!!!!!!!!!!!
Answer:
Its option 3 hope this help with your test good luck
What is the smallest unit ?
Answer: B) cell
the smallest unit of life is a cell
Tertiary consumers
Secondary consumers
Primary consumers
Producers
17.
As you go up each level of the food pyramid,
energy is lost to
,and
A. laughing, vomiting and breathing
B. Waste, laughing and sleeping
C. Waste, digestion and vomiting
D. Waste, respiration and heat
Foods usually
when they are processed.
Ο Α
O A
become more expensive
B
lose some nutrition
С
change into smooth paste
OD
turn unusual colors
Summarize the process of sexual reproduction and explain how variations of inherited traits can increase or decrease an organism’s chance of survival
Answer:
Explanation:
A Human cell has 46 chromosomes. (I’ll use humans to keep things simple). In sexual reproduction both humans have 23 chromosomes, in their sex cells. (Men have 23 in a sperm and women have 23 in an egg cell). These half cells merge to create 1 unique cell, that has characteristics of both male and female. The cells multiply and then a baby is born with a unique set of genes. These cause variations, and remember these variations can carry from generation to generation. As for how variations can increase a chance for survival, variations allow unique gene sets to be made, so that in case of a disease (in this case I’ll use a disease, but it could also include harsh environmental conditions), these unique gene sets may give an individual natural immunity to the disease. How can a variation decrease an organisms chance for survival? Well, s there are many ways that a unique gene set can make it difficult to survive. For example a genetic disease your family has had a history with. These diseases include, but are not limited to, cancer, diabetes, and schizophrenia.
Plants lose water through their
leaves when the stomata open
to let carbon dioxide into the
leaf. What is the name of this
process?
PLZ HELP!! ASAP!!
Carbohydrates have chemical bonds that are a good source of energy for living things. A monosaccharide is a carbohydrate made by plants when energy from the sun combines water and carbon dioxide.
How are the two other types of carbohydrates formed? Give examples of each type.
Explanation:
The other two types of carbohydrates, disaccharides and polysaccharides, are formed when monosaccharides link together to form larger molecules and chains. A disaccharide is a sugar that is made from two monosaccharides (di=two). For example, sucrose is a disaccharide that is made from the bonding of glucose with fructose, which are both monosaccharides. Sucrose is known as table sugar, and is found naturally in plants. Polysaccharides are large, complex molecules that are formed when monosaccharides or disaccharides link together in repeating units to form long chains. The most abundant polysaccharide in the world is cellulose, the substance that makes up the cell wall of plant cells. Starches are also examples of polysaccharides, and these are stored in plants such as grains, corn and wheat.
All living organisms must obtain energy in order to survive, and most organisms rely on carbohydrates as energy sources. These molecules are made through the process of photosynthesis, and they store the sun's energy within them.
(Please Help ASAP) (Brainlyest) (10 Points)
Your conclusion will include a summary of the lab results and an interpretation of the results. Please write in complete sentences.
Describe the relationship between cell shape and function. Give an
example of cell shape influencing cell function.
Answer:The shape of a cell greatly influences its function. Each cell has a shape that best suits its functions. For example, red blood cells are round with a large surface area on top to absorb maximum oxygen. ... Nerve cells are long and have elongated terminal branches to pass messages over long distances in our body.
Explanation:
Investigator Benton uses several methods to analyze hair samples found at the crime scene. He examines the physical features of the hairs, their color and shape, as well as the medulla of the hairs. Using the hair root, he tests for nuclear DNA and also for mitochondrial DNA. Which of these tests would most likely indicate the owner's identity?
Morphology
Medulla
Nuclear DNA
Mitochondrial DNA
Answer: Nuclear DNA
Explanation:
Got it right.
Explain what white light is and what it's made of, what do we see it as
PLZ HURRY
Answer:
The electromagnetic spectrum covers electromagnetic waves with frequencies ranging from below one hertz to above 1025 hertz, corresponding to wavelengths from thousands of kilometers down to a fraction of the size of an atomic nucleus. This frequency range is divided into separate bands, and the electromagnetic waves within each frequency band are called by different names; beginning at the low frequency (long wavelength) end of the spectrum these are: radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays at the high-frequency (short wavelength) end. The electromagnetic waves in each of these bands have different characteristics, such as how they are produced, how they interact with matter, and their practical applications. The limit for long wavelengths is the size of the universe itself, while it is thought that the short wavelength limit is in the vicinity of the Planck length.[4] Gamma rays, X-rays, and high ultraviolet are classified as ionizing radiation as their photons have enough energy to ionize atoms, causing chemical reactions.
Explanation:
Answer:Each color has a different wavelength. Red has the longest wavelength, and violet has the shortest wavelength. When all the waves are seen together, they make white light. White light is actually made of all of the colors of the rainbow because it contains all wavelengths, and it is described as poly chromatic light.
Explanation:
Hope this helps :)
You're eating a bowl of
fruit but you're starting to
feel full.
Answer:because it has low energy density an lots of fiber it helps you feel full longer
Explanation: fruit recommended
Please help me out ......
Describe an approach for understanding global systems and the chages they undergo.
Answer:
I definitely agree with the person above seems like a legit well thought out awnser
Of the three waves shown, Wave 2 has the greatest
wave speed, because it has more crests than the other ropes
O frequency because it has a large wavelength than the other ropes
wave speed because the rope is moving up and down faster than the other ropes
frequency, because there are more crests in the same length of rope than there are in the other waves
Answer:
D. frequency, because there are more crests in the same length of rope than there are in the other waves
Explanation:
Wave frequency is defined as the number of waves passing a fixed point at a given time.
Wave frequency is highly influenced by the number of crests in the wave that pass the fixed point in 1 second. It means, more is the number of crests in the same length of rope, the higher will be the wave frequency.
Wave 2 has a maximum number of crests and thus wave 2 has the greatest wave frequency in comparison to other ropes.
Hence, the correct answer is "D".
Attraction between molecules of the same
substance solution
Answer:
The attraction among molecules of a substance is called cohesion. Cohesion due to hydrogen bonds makes water molecules "stick together". The attraction among molecules of different substances is called adhesion.
Hope this helps :)
carbon moves in the ____ by photosynthesis
A. hydrosphere
B. biosphere
C. geosphere
D. atmosphere
Answer:
it moves in the atmosphere
What’s the biggest change in skull anatomy that occurred from the dawn of horse to the modern horse
Answer:
Each skull has a large diastema, or gap between the front and back teeth. 2. What is the biggest change in skull anatomy that occurred from the dawn horse to the modern horse? The size of the skull is dramatically larger in the modern horse.
Explanation:
The main change in skull anatomy that occurred from the dawn horse to the modern horse is that the skull of the modern horse is dramatically larger.
What are the characteristics of the dawn horse?Eohippus, (genus Hyracotherium), also called dawn horse, an extinct group of mammals that were the first known horses. They flourished in North America and Europe during the early Eocene (56-33.9 million years ago).
Eohippus, "dawn horse" or more correctly called Hyracotherium, which lived in the Eocene approximately 55-58 million years ago, is the oldest ancestor of the modern horse.
Hyracotherium, or eohippus (dawn horse), as scientists called it, first appeared on earth as a small, shy creature no bigger than a dog. It existed between 55 and 5 million years ago.
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(EASY 10 POINTS AND BRAINLEYEST)
Detailed information about the processes and tectonic plate interactions that are causing the volcanos to occur. Include an explanation of convection currents.
Answer:
Tectonic plates recurring over and over again cause a rupture in the Earth's crust. This agitates the magma in volcanoes, causing the volcano to erupt.
Explanation:
Answer:
These tectonic plates rest upon the convecting mantle, which causes them to move. The movements of these plates can account for noticeable geologic events such as earthquakes, volcanic eruptions, and more subtle yet sublime events, like the building of mountains.
Explanation:
1. SCIENTISTS HAVE DISCOVERED THAT BEFORE AN ERUPTION, EARTHQUAKES GENERALLY
Answer: Increase in number
Explanation:
If the object shown has a mass of 80g, what is the density?
Answer:
C. 1.23 g/ml
Explanation:
[tex] Density = \frac{Mass}{Volume} [/tex]
Mass of rock = 80g
Volume of rock = final fluid volume - initial fluid volume
Volume of rock = 265 cm³ - 200 cm³ = 65 cm³
[tex] Density = \frac{80g}{65 cm^3} [/tex]
[tex] Density = 1.23 g/cm^3 [/tex]
1 cm³ = 1 ml
Therefore, density of the object = 1.23 g/ml
Describe the factors that influence the development and type of soil in a certain area.
Soil research has shown that soil profiles are influenced by five separate, yet interacting, factors: parent material, climate, topography, organisms, and time. Soil scientists call these the factors of soil formation
Answer:
Factors that determine a soil's characteristics include: the type of parent rock from which the soil forms, the climate in the area, the slope of the land, the type and amount of vegetation, and the length of time the rock has been weathering.
Explanation:
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