Answer:
pollen and ovule
Explanation:
Pollination happens when a pollen grain, which contains half the genetic material needed to produce a new seed, is transported to an ovule.
What are the genetic makeup of pollen and ovule?The megagametophyte is found in the ovule, whereas the pollen grain is the microgametophyte.
Pollen grains are male reproductive structures that give rise to sperms, whereas ovules are female reproductive structures that give rise to egg cells. This is the primary distinction between pollen grains and ovules.
A flower has more pollen grains than ovules so that the pollen has a better chance of reaching the ovules.
Where it will have a better chance of causing them to produce seeds, which will lead to the growth of additional plants.
The portion of a flower that contains the egg and which supplies the other half of the DNA needed for a viable seed to form.
Therefore, pollen and ovule plant cells contain half the DNA from one parent plant.
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Students are provided with a choice of two solutions. Each one is used to test for
the presence of a different chemical.
99
Solution
Tests for the presence of
Fehling's solution
Sugar
Lime water
Carbon dioxide
How could the students use one of these solutions to gather evidence for the
action of photosynthesis?
Pump the air from a closed container containing a plant through a sample of lime water.
O Grind up all parts of a plant, expose them to heat, collect the gas, and use lime water to test it
o Use Fehling's solution with the roots of several different species of plants, after boiling them for several minutes.
Use Fehling's solution on plant leaves exposed to light and on plant leaves covered in aluminum foil for a week.
What uses the age of layers to figure out how old
something is?
O A. Precambrian dating
O B. Radiometric dating
C. Relative dating
O D. Mesozoic dating
Answer:
Relative dating
Explanation:
Relative dating can determine the relative age of something.
Lil' brother needs help
i don't know...........
Is this right if not please help
Answer:
You are right!!!!!!!!!!
Please help
Colorblindness is a sex-linked trait that is caused by a
common X-linked recessive gene. In the Punnett square
to the right what is the probability of the female offspring
being colorblind?
A) 50%
B) 100%
C) 75%
D) 0%
Answer:B
Explanation:
5. When is extinction of a species most likely to occur?
A)when environmental conditions remain the same and the proportion of individuals within the species that lack adaptive traits increases
B)when environmental conditions change and the members of the species lack adaptive traits to survive and reproduce
C)when environmental conditions change and the adaptive traits of the species favor the survival and reproduction of some of its members
D)when environmental conditions remain the same and the proportion of individuals within the species that possess adaptive traits increases
Answer:
Extinction occurs when species are diminished because of environmental forces (habitat fragmentation, global change, natural disaster, overexploitation of species for human use) or because of evolutionary changes in their members (genetic inbreeding, poor reproduction, decline in population numbers).
The extinction of a species is most likely to occur when environmental conditions change and the members of the species lack adaptive traits to survive and reproduce.
What do you mean by Species?Species may be defined as a group of organisms that can reproduce naturally with one another and create fertile offspring.
If the members of species do not have adaptive traits to survive and reproduce, they will definitely become extinct in near future.
This is because the relative fitness is directly related to the appearance or existence of particular species in the habitat.
Therefore, the extinction of a species is most likely to occur when environmental conditions change and the members of the species lack adaptive traits to survive and reproduce.
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PLEASE HELP!!!! This is a situation so major! My life depends on it!!!
Answer:
The lighter moths would be more suitable and the darker moths would eventually die out since they have no camouflage, thus an influx of lighter moths will emerge.
Explanation:
Question 2
1 pts
When species have differences in coloration or appearance, we say the species has...?
O Variation
o Competition
Homology
O Heritability
1 pts
Question 3
of competition?
Answer:
it's answer is variation
list two ways that trees help cities.
Answer:
Trees give off oxygen that we need to breathe. Trees reduce the amount of stormwater runoff, which reduces erosion and pollution in our waterways and may reduce the effects of flooding.
Explanation:
Hope that helps
Answer: They help produce oxygen to reduce pollution
They help against climate change
Explanation: U got this purrrr
Give a correct biological term for each of the following
organisms made up of one cell only
help pls ( life science )
Answer:
bacteria, protists, and yeast.
Explanation:
Mae is studying evaporation as part of her science fair project. She wants to answer the following question: What variables affect the rate of evaporation of water? She thinks that temperature and humidity affect evaporation rate. Has she formed a hypothesis, a scientific law, or a scientific theory?
A. A hypothesis
B. A scientific law
C. A scientific theory
D. None of the above
Answer: A. a hypothesis
Explanation: i got it wrong and it said hypothesis
Cancer is a disease caused by mutations. Yet in most instances, if a parent tragically dies from cancer, this does not put their child at a greater risk than a person who parents don't develop cancer. How can cancer be caused by mutations and ot be heritable?
a. most cancers arise from mutation in germ line cells
b. mutations that cause cancer occur on specific cells, such as sex cells
c. mutations caused by environmental agents, such as tobacco smoke, occur in somatic cells
d. mutations that cause cancer are specific and cannot be passed on regardless of the type of cell they occur in
Answer:
c. mutations caused by environmental agents, such as tobacco smoke, occur in somatic cells
Explanation:
just because you're parents smoked and got lung cancer doesn't mean you'll get lung cancer. (unless you're breathing the smoke, but that's different from inheriting it.)
Which cellular structures would you find in plant cell but not in an animal cell?
Answer: cell wall and lysosomes
Explanation:
Which of the following is organized from smallest to largest?
A Chromosome, gene, nucleic acid
B Nucleic acid, chromosome, gene
C Nucleic acid, gene, chromosome
D Gene, chromosome, nucleic acid
Metamorphic rocks are formed by the cooling of magma inside the earth or on the surface ?
Answer:
false, thats igneous rocks
what are some of the services that a healthy biodiversity provides for everyone?
Answer:
it gives a greater variety of crops
Explain the process of photosynthesis in a plant in detail.
Answer:
Photosynthesis is the process through which plants convert light energy from the sun to chemical energy. The chemical energy is then stored as sugar. During the process of photosynthesis, plants capture light energy and use it to convert water, carbon dioxide, and minerals into oxygen (released into the air) and glucose (stored in the plant and used as food).
Explanation:
The plant takes in carbon dioxide in the atmosphere through the stomata on its leaves. It is worth noting that there are some stomata on the stems as well.
Water gets into the plant mainly through the roots and finds its way to the leaves, where photosynthesis occurs. Plant roots are specially designed to draw water from the ground and transport it to the plant leaves through the stem.
Chlorophyll, the green coloring matter of the leaf, traps the energy from sunlight as it shines on the leaf. It is worth noting that it is chlorophyll that gives the leaf its green color.
The solar energy is used to break water down into hydrogen and oxygen. Then hydrogen is combined with carbon dioxide to make sugar, which is food for the plant. Oxygen is released as a byproduct through the stomata.
Answer:
The roots absorb water and nutrients. Water is carried to the leaf by the xylem in the stem. Carbon dioxide enters the leaf through the stomata. Energy from the sun is captured by chlorophyll in the chloroplasts. The process begins once these three reactants are present. Sunlight provides energy for a series of chemical reactions. Molecules break apart and join with other molecules to form glucose, which is a sugar or food for the plant, and oxygen, which is released into the air.
Explanation:
Sample Response on edge
Why are plants like grasse able to
reproduce more quickly than others?
A.) The pollen is able to spread with the wind farther and faster.
B.) The seeds are able to fertilize and grow in the soil at a faster rate.
C.) The root may grow horizontal rhizomes that make new shoots.
Answer:
C.) The root may grow horizontal rhizomes that make new shoots.
Explanation:
Plants like grasses able to reproduce more quickly than others because their roots grow horizontal rhizomes into a new shoots. These grasses spreads in the soil due to movement of rhizomes horizontally and grows its shoot with this movement. This spreading helps the grasses to make carpets in the grounds and has the ability to grow faster than other plants so we can say that growth of horizontal rhizomes is responsible for quick growth of grasses.
What are the fifteen different structures found within eukaryotic cells?
Answer:
cell membrane, nucleus, nucleolus, nuclear membrane, cytoplasm, endoplasmic reticulum, Golgi apparatus, ribosomes, mitochondria, centrioles, cytoskeleton, vacuoles, and vesicles.
Explanation:
sorry but these are only 13
The original bacteria kingdom was divided into two separate kingdoms based on analysis of their (fill in the blank) RNA sequences.
They are divided into two separate kingdoms based on analysis of their
r RNA sequence.
Woese and his colleagues suggested that the original bacteria kingdom should be divided into two new kingdoms, called Eubacteria and Archeabacteria.What is archea bacteria?Archea bacteria are a group of microorganisms considered to be an ancient form of life It is evolved separately from the bacteria and blue-green algae, and they are sometimes classified as a kingdom.To know more about archea here
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What evidence from Irina's experiment can be used to show the relationship among light,oxygen, and sugar in photosynthesis
The evidence from Irina's experiment can be used to show the relationship among light, oxygen, and sugar in photosynthesis is that green plants prepare their own food in the presence of sunlight.
What is photosynthesis?Photosynthesis is defined as the the process by which green plants prepare their own food in the presence of sunlight and the heat energy converted into light energy and due to this reason green plants are known as the autotrophs.
Leaf has been known as the basic site of the photosynthesis it means that process of the photosynthesis occurs in the leaf. The main function of the leaf has to produce food material for plants which will help plants to get nourished.
There has been mainly two types of leaves and these are the simple and compound leaves. The simple leaf has been one in which single lamina has been attached to the stem by the help of petiole and compound leaf is the one in which lamina is divided into leaflets.
Therefore, The evidence from Irina's experiment can be used to show the relationship among light, oxygen, and sugar in photosynthesis is that green plants prepare their own food in the presence of sunlight.
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What do you mean by human made resources ?
Answer:
Human beings change resources in two new form like people use natural resources to make buildings, bridges ,machinery and vehicles with the help of technology such resources are called human-made resources. ... Likewise, technology is also a man-made resource. Man-made resources are mostly renewable.
Human made resources are those resources that are created by humans, as opposed to being found in nature. This includes both physical resources like buildings, machines, and tools, as well as intangible resources like intellectual property, knowledge, and know-how. Human made resources are a key factor in economic development and prosperity, and are essential for businesses and organizations of all sizes.
Hope this helps :)
what is the picture showing ?
Answer:
a mixture of elements
Explanation:
hope that helped
How would scientists know if population were increasing or decreasing over time
who knows at this point. i dont even know what day it is.
Help please and thank you
Answer:
C
Explanation: nice job
hehe guess what- I need help
Answer:
a) another living cell
Explanation:
"All living cells arise from pre-existing cells by division."
Answer:
a; another living cell
Explanation:
according to cell theory and a guy named Rudolf Virchow, "all cells must come from pre-existing cells."
that basically mean that the cell in the picture had to have come from a living cell, not energy from the sun, or a multicellular orgasm.
Which occurs in the integumentary system after a deep injury occurs to the system?
Multiple choice question.
A)
Red blood cells fight off pathogens.
B)
Blood quickly clots to form a scab.
C)
Epidermis cells increase their size.
D)
Dermis cells close the injured vein.
Answer: The correct answer is B
As a general rule elements in group 18 do not form compounds. consider the following section of the periodic table. which of the following explains why elements in group 18 do not readily form compounds
DUE TODAY HELP PLS !
Answer:
I NEED SOME POINTS TO ASK A QUESTION.
Explanation:
If the DNA code is CCG-ATT. What does the mRNA will code for? *
How does burrowing benefit toads?
Answer:
Burrows provide shelter from predators and extreme temperatures. For these reasons, animals have used burrowing behavior for a very long time. It helps frogs and toads
Explanation: