Answer:
Exhaust valve
Explanation:
The function of the valve in internal combustion engine is to give a free passage to air in and out. The intake valve lets the fresh air into the engine while the waste products of combustion are eliminated through exhaust valve.
Homologous pairs of chromosomes carry genes that control the same inherited traits. These pairs are known as:
A. Gametes
B. Haploids
C. Diploids
D. Tetrads
E. Chiasma
Answer:
Meiosis produces ________ daughter cells.
A) two haploid
B) two diploid
C) four haploid
D) four diploid
C
At which stage of meiosis are sister chromatids separated from each other?
A) prophase I
B) prophase II
C) anaphase I
D) anaphase II
D
The part of meiosis that is similar to mitosis is ________.
A) meiosis I
B) anaphase I
C) meiosis II
D) interkinesis
C
If a muscle cell of a typical organism has 32 chromosomes, how many chromosomes will be in a gamete of that same organism?
A) 8
B) 16
C) 32
D) 64
B
Explain how the random alignment of homologous chromosomes during metaphase I contributes to variation in gametes produced by meiosis.
Random alignment leads to new combinations of traits. The chromosomes that were originally inherited by the gamete-producing individual came equally from the egg and the sperm. In metaphase I, the duplicated copies of these maternal and paternal homologous chromosomes line up across the center of the cell to form a tetrad. The orientation of each tetrad is random. There is an equal chance that the maternally derived chromosomes will be facing either pole. The same is true of the paternally derived chromosomes. The alignment should occur differently in almost every meiosis. As the homologous chromosomes are pulled apart in anaphase I, any combination of maternal and paternal chromosomes will move toward each pole. The gametes formed from these two groups of chromosomes will have a mixture of traits from the individual’s parents. Each gamete is unique.
In what ways is meiosis II similar to and different from mitosis of a diploid cell?
The two divisions are similar in that the chromosomes line up along the metaphase plate individually, meaning unpaired with other chromosomes (as in meiosis I). In addition, each chromosome consists of two sister chromatids that will be pulled apart. The two divisions are different because in meiosis II there are half the number of chromosomes that are present in a diploid cell of the same species undergoing mitosis. This is because meiosis I reduced the number of chromosomes to a haploid state.
Explanation:
i had those ecact questions hope this helps plz mrk brainliest
The picture below shows a lead sheet and a lead pipe.
The lead sheet and lead pipe would have
the same mass
the same chemical properties
different crystal structures
different arrangement of atoms
What type of growth is characterized by a consistent increase in growth rate?
A) Exponential growth B) Carrying capacity growth
C) Logistic growth D) Stable growth
Answer:
It is Exponential growth.
Explanation:
Carrying capacity is the most amount of each population that a ecosystem can hold.
Logistic growth is not consistent.
The type of growth that is significantly characterized by a consistent increase in growth rate is known as Exponential growth. Thus, the correct option for this question is A.
What is Exponential growth?Exponential growth may be characterized as a type of growth that is followed by continuous breeders. The population of continuous breeders contains more individuals than a similar population breeding annually.
Some examples of this growth pattern include insects, humans, bacteria, internal parasites, larger plants, and animals. In this type of growth pattern, the value of carrying capacity must be reached fat as compared to other growth patterns like logistic growth.
Therefore, exponential growth is a type of growth that is significantly characterized by a consistent increase in growth rate. Thus, the correct option for this question is A.
To learn more about Exponential growth, refer to the link:
https://brainly.com/question/72197
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9 Light cannot escape the intense gravitational pull of a
black dwarf
red giant
main-sequence stan
black hole
A stream eroding a rock is an example of ______
a. biosphere interacting with the hydrosphere
b. biosphere interacting with the biosphere
c. hydrosphere interacting with geosphere
d. blasphere interacting with the atmosphere
!answer quick will give branliest!!
Answer: hydrosphere interacting with the geosphere
Explanation: This is actually a very simple question. A stream is clearly from the hydrosphere, as originated from the greek root hydro, meaning water, and rocks are from the geosphere, as geo is the greek root for earth. A water source eroding a earth source is the hydrosphere interacting with the geosphere.
The purpose of oxygen in the body is to serve as the
Answer:
We breathe because oxygen is needed to burn the fuel [sugars and fatty acids] in our cells to produce energy.) What happens in the process of respiration? (Oxygen is brought into the lungs via breathing, where it is transported by red blood cells to the entire body to be used to produce energy.
Why is water so effective at hydrogen bonding?
Choose 1 answer:
(Choice A)
The hydrogens in water are ionically bonded to the oxygen.
(Choice B)
Hydrogen is more electronegative than oxygen, so it is more likely to donate its electrons to oxygen.
(Choice C)
Oxygen is very electronegative and strongly attracts hydrogen's electron.
(Choice D)
There are two hydrogens, doubling the positive charge on the water molecule.
Answer:
Choice A
Explanation:
Water molecules forming hydrogen bonds with one another. The partial negative charge on the O of one molecule can form a hydrogen bond with the partial positive charge on the hydrogens of other molecules. Water molecules are also attracted to other polar molecules and to ions.
An energy harvesting process is depicted above. On which branch of the tree of life would organisms be able to perform this process?
A)On all branches of the tree, as glycolysis is a universal, energy-releasing process for cells. B)Only on the branch with Eukarya, as eukaryotes are the only organisms that contain mitochondria. C)Only on the branch with Archaea, as extremophiles are the only organisms that evolved the ability to process pyruvate. D)Only on the branch with Bacteria, as prokaryotes are the only organisms that contain enzymes necessary to perform this process
A: on all branches of the tree, as this is a common structure and process among all species
During meiosis, homologous chromosomes exchange genetic
material. This exchange of genetic material -
The shortest day of the year in Canada happens during _____.
March
September
June
December
can you guys help me asp
The shortest day of the year in Canada happens during December 21.
Approximately how long ago did our current era begin ? O A. 1 million years OB. 4.5 billion years C. 65 million yearsO O 100, 000 years
Answer:
C. 65 million years ago
Explanation:
The current locations of the continents and their modern day inhabitants, including humans, can be traced to this period.
Pls vote brainliest :)
What did Mendel's cross-pollination of pea plants prove?
A. Inheritance of certain factors is dependent upon the genetic code.
B. Certain factors are dominant, and other factors are recessive.
C. All the cells in an organism carry the same hereditary factors.
D. Crossing a tall plant with a tall plant will always result in a tall plant.
Answer:B
Explanation:
Answer: The correct answer is B- Certain factors are dominant, and other factors are recessive. :)
Explanation:
I took the test. I also had to read a lot about Mendel for my science class.
Hope this helps! <3
A ______factor is of or pertaining to living organisms.
Answer:
A biotic factor is a factor that pertains to Living or Once-living things.
Explanation:
Answer:
in the blank would be biotic
Explanation:
A keystone species is a living thing, plant or animal, that is crucial to the workings of the food web
Answer:
true
Explanation:
The best title for the graphic organizer shown above would be:
A. Vertebrate Reproduction
B. Invertebrate Reproduction
C. Mammal Reproduction
D. Primate Reproduction
Answer:
c. Mammal Reproduction
Explanation:
They're all types of mammals
Skin color and height are polygenic traits which means
many genes code for one trait
one gene codes for each trait
Answer:
Many genes code for one trait
Explanation:
Poly >> Many
Drosophila eye color is an X-linked trait. Red eye color is dominant, and white eye color is recessive. Which Punnett square shows the probability that 100 percent of offspring will have red eyes?
Answer:
Which of the following equations are balanced correctly?
2Ag2O → 4Ag + O2
Zn + HCl → ZnCl2 + H2
Cu + H2O → CuO + H2
2C4H10 + 13O2 → 8CO2 + 10H2O
Explanation:
Answer: it’s A
Explanation:
True or False: Carbon can't get from the deep ocean to soils on the land. There
is a different type of carbon on land
Answer:
False it's the same type of carbon
Explanation:
hope this helps
Which of the following are types of pollution directly created by fossil fuel use?
Select one or more:
A. thermal pollution
B. noise pollution
C. visual pollution
D. air pollution
E. light pollution
F. water pollution
G. radioactivity
H. soil contamination
Answer:
A. thermal pollution
D. air pollution
F. water pollution
I think that is all of them but tell me if this is wrong
Explanation:
Answer:A. thermal pollution
D. air pollution
F. water pollution
Explanation:
Can someone help me with these three questions I can’t figure them out i will mark u as the best answer
Answer:
it is colorful for its pollinators, I believe butterfly's but I'm not 100% sure and, evolution of individuals but I could be wrong because I cant see the last one
What structures of a diatom work together to carry out all of its life functions?
A. Specialized cells
B. Organelles
C. Tissues
D. Organ systems
Answer:organelles
Explanation:
Is the answer
Answer:
B
Explanation:
I took the test and got it right so its organelles
What term is used to describe a system that loses energy to objects that are not part of the system?
raised
low
OOOO
open
closed
Answer:
open
Explanation:
Answer:
open
Explanation:
edge2o2o
HURRY 20 POINTS WILL MARK BRAINILEST
A scientist places four identical cells into four different liquids, each with different concentrations of magnesium. Cell Description of Liquid Result W Slightly more magnesium than the cell Took in magnesium X The least amount of magnesium Took in magnesium Y Slightly less magnesium than the cell Took in magnesium Z The most amount of magnesium Took in magnesium Which shows evidence of active transport? cells W and Z cell W only cell Y only cells X and Y
Answer:
It’s cells x and y
Explanation:
Answer:
X and Y
Explanation:
How/why is ecosystem diversity important?
Answer:
Ecosystem diversity is a type of biodiversity. It is the variation in the ecosystems found in a region or the variation in ecosystems over the whole planet. Biodiversity is important because it clears out our water, changes out climate, and provides us with food.
Explanation:
It clears out water , makes safe climate change and provides everyone with a meal
Please hurry it’s urgent
Consider the food web seen here. One member, the northern spotted owl, lives in cavities of trees in old-growth forests. Old
growth forests contain trees that are more than 200 years old and have not been cut, pruned, or managed. Imagine that these
forests have been heavily logged, Predict the outcome on this food web if the habitat of the owl is removed.
A)
The food web will collapse without this top-level consumer present.
B)
The niche filled by the owl will be filled by other predators like the hawk
and fox
The niche filled by the owl will be empty. The other animals within the
food web will grow unchecked.
D
Without the owl present, the empty niche will result in an overpopulation
of hawks. Eventually the lower-level consumers will disappear
Answer:
B.
Explanation:
Which of these practices does the most to keep wind and water from Carrying away topsoil?
Answer:
the answer would be no-till farming
Explanation:
when the soil is compacted and naturally embedded into the ground the wind wont be able to throw it around and the water would be unable to wash away the seeds and or crops. hope this helps if you wanted to know why
PLEASE HELP FAST
_____________ is a nonrenewable fuel created from the remains of living organisms.
Answer:
Fossil fuel is the answer.
Hope this helps:)
Sry if wrong
Answer:
Oil, NaturAL gAS, OR COAL
Explanation:
How would permeability change if types of channels in a neuron change?
Answer:
Explanation:
How the resting membrane potential is established in a neuron. ... Ions move down their gradients via channels, leading to a separation of charge that ... through brief, controlled changes in the permeability of their cell membrane to particular ... If you did this, you would measure an electrical potential difference, or voltage, ...
Membrane permeability is affected by temperature, the type of solute present, and the degree of cell hydration. Increasing the temperature makes the membrane more unstable and very fluid. Lowering the temperature slows the speed of the membrane.
Does the permeability change during the action potential?Action potentials, the main electrical signal produced by nerve cells, reflect changes in membrane permeability to specific ions.
The important point is that increasing Na + permeability causes more depolarization, resulting in the opening of more Na + channels and further depolarization of the membrane potential.
Membrane permeability to water and solute has been shown to depend on temperature, the osmotic pressure of the medium, the type of solute present, the degree of cell hydration, and the presence or absence of ice.
Learn more about permeability here: https://brainly.com/question/19360972
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Why should the United States be concerned about air pollution in china
Answer:
The United States should be concerned because many of the things they have is manufactured or made in China . Some things like food or things that could be affected by germs or pollution could affect the users of it and make them sick.
Answer:
c. wind carries air pollution
Explanation:
The large, grazing mammals typical of specific _______ biomes known as savannas include elephants, zebras, and giraffes.
A.
grassland
B.
desert
C.
taiga
D.
temperate forest
