Answer:
natural selection is natural, selective breeding is not. Natural selection is when the best genes are passed down. Selective is when the best of an animal group are forced to mate
Explanation:
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Does natural selection affect humans? How and why
Answer:
Yes it does affect humans.
Explanation:
Natural selection acts on the phenotype, but evolution is a change in the frequency of alleles in a population over time, a change in genotype. So natural selection acts on phenotype, but it is the connection to genotype that makes it the mechanism of evolution. Many traits vary among different members of a population of humans and animals, from body size to hair color, and those differences are often linked to differences in genes. Natural selection occurs when some of those traits help some individuals survive and reproduce more than others. In scientific terms, these hazards are referred to as selection pressures. They put pressure on us to adapt in order to survive the environment we are in and reproduce. It is selection pressure that drives natural selection "survival of the fittest" and it is how we evolved into the species we are today.
Ducks have flat beaks and webbled legs
The cell spends 90 percent of its time performing "everyday" functions, growing and preparing to divide during
Answer:
interphase
Explanation:
Interphase is the most important phase of cell life cycle where it spends 90 percent its time in regulating the metabolic activities of the cell. In this phase cell undergoes several metabolic activities to maintain the growth of the cell.
There are three phases in interphase G1, S and G2. During this phase cell undergoes several changes that include cell grows, DNA replicates and prepare itself for mitosis.
Hence, the answer is "interphase".
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Give and example of functional differences between cells belonging to two different parts of the human body???
Answer:Cells of the digestive system are vastly different in structure and function from cells of the skeletal system. Cells of the body depend on each other to keep the body functioning as a unit.
Cells of the digestive system are different in nature and function from cells of the skeletal system. Cells are depend on each other to keep the body as a unit.
What is cell theory?Cell theory is a scientific theory that's help to learn how living organisms are made up of cells, that's they are the basic structure unit of all organisms, and that all cells from pre-existing cells.
Types of cell:
Prokaryotic Cell
Prokaryotic cells are single-celled microorganisms known to be earliest on earth.
Eukaryotic cell
Eukaryotic cells have a nucleus enclosed within the nuclear membrane and form large and complex organism.
The main difference between unicellular organisms and multicellular organisms is that unicellular organism is unspecialized it means all the body function depends upon only on the single cell and in multicellular organism there is specific cells for specific purposes.
Multicellular and unicellular organisms are perform almost all the life running activities and processes such as respiration, reproduction digestion, breathing, and metabolism.
In unicellular organism division of labour is at the organalle level on the other hand in multicellular the division of labour at cellular, tissue, organs and organ system level.
Unicellular organism has simple body organization and multicellular organism have complex body organism.
Therefore, Cells of the digestive system are different in nature and function from cells of the skeletal system. Cells are depend on each other to keep the body as a unit.
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Which of the following is not a property of life?
A. molding and changing one's environment
B. regulating materials that enter or leave the system
C. responding to stimuli
D. maintaining a relatively constant internal condition
Answer:
A
Explanation:
all the others make no sence
A. molding and changing one's environment
Life can be defined the condition that distinguishes animals and plants from inorganic matter, including the capacity for growth, reproduction, functional activity, and continual change preceding death.
Out of the given options the statements that comes under a property of life are:
B. regulating materials that enter or leave the system
C. responding to stimuli
D. maintaining a relatively constant internal condition
Thus, the statement which is not a property of life is molding and changing one's environment. Since we can't change one's environment or either mold it, i.e. option A.
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Which is not true about natural selection?
a. there must be diversity in the population
b. It is driven by natural processors like predator or weather
c. Humans are involved and can select the most desirable organisms
d. predators, geological activity, and weather can all have an impact on organisms
Answer:
D. seems like an appropriate answer since its true
Explanation:
explain whether the following statement is true or false: “All arteries carry blood with oxygen and all veins carry blood with carbon dioxide.”
Answer:
False
Explanation:
Important parts of circulatory system are heart, capillaries, veins, and arteries. The arteries are responsible for carrying red blood from heart and deliver oxygen to capillaries. Then capillaries deliver the waste carrying blood or deoxygenated blood to veins back to the heart.
But not all arteries carry blood with oxygen, the pulmonary arteries carry deoxygenated blood and not all veins carry blood with carbon dioxide, the pulmonary veins carry blood with oxygen.
Hence, the given statement is true.
If a human baby's cells contain one X chromosome and one Y chromosome the baby must be
First test for the 2 sem
Answer:
male
Explanation:
Normally, a child will be a male if he inherits one X chromosome from his mother and one Y chromosome from his father. A child will be a female if she inherits a double dose of X (one from each parent) and no Y.
the answer is A femaleeeee
Which type of cell is capable of self-renewal?
A stem cell
B blood cell
C muscle cell
D neuron
the process that are responsible for growth development and other vital functions
Answer:
For one to form, there needs to be warm ocean water and moist, humid air in the region. When humid air is flowing upward at a zone of low pressure over warm ocean water, the water is released from the air as creating the clouds of the storm. As it rises, the air in a hurricane rotates.
Explanation:
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During which stage of the water cycle does water from the ocean form clouds?
A) Precipitation
B) Condensation
C) Evaporation
D) Collection
Answer: B) Condensation :)
Explanation:
Answer:
C. evaporation!
Explanation:
water evaporates and goes up
In osmosis molecules move through a semi-permeable membrane from a high concentration to a low concentration. True or False
Answer:
False
Explanation:
Osmosis is the movement of water molecules through a selectively permeable membrane from high to low concentrations.
Diffusion is the process in which molecules move from an area of high concentration to low concentration.
The statement doesn't say that the molecules are water, so we put false. If it is wrong then tell the teacher that she has to include water molecules in there to be more detailed.
Why are the layers in the rock important?
Answer:
Explanation:
Why are layers of rocks related to each other?
Layering, or bedding, is the most obvious feature of sedimentary rocks. ... This Law of Superposition is fundamental to the interpretation of Earth history, because at any one location it indicates the relative ages of rock layers and the fossils in them. Layered rocks form when particles settle from water or air.
In pea plants, gree pea ponds (P) are dominant over yellow pods (p)
If two pea plants heterozygous for pod color (Pp) reproduced, what percentage of the offspring would be predicted to have yellow pods?
A. 50%
B. 100%
C. 75%
D. 0%
E. 25%
why does mouth water when you see food?Does it serve a purpose?
Answer:
no because you want to become fat without doing any thing go read your textbok
you will find it on page 15 9 line 12 word Explanation:
Answer:
Yes
Explanation:
When you see, smell or think of food your brain sends signals to the glands responsible for saliva production. ... We salivate as a reflex to prefer for the consumption and digestion of food. Saliva is needed to keep your mouth and teeth healthy so keep drooling people!
does the cow go moo?
Answer:
because it does
Explanation:
Answer:
yes?
Explanation:
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please just answer a few biology questions for me!
the figure below shows a cross between two rabbits. in rabbits, black fur (B) is dominant to brown fur (b).
(questions are attached to the images)
Answer:
Explanation:
1. The fur in both parents is Black, they both have dominant traits
2. Phenotype in box 3 would be Black.
3. Genotype ratio is 1:3
Does a nerve cells contain a cell wall and a large, central vacuole? Explain why or why not.
Biotic potential increases a population's
ability to survive. Which of the following
would be considered a factor for biotic
potential?
A. generalized niche
B. low reproductive rate
C. small food supply
D. inability to hide from predators
Answer:
Explanation:
A
If the sequence of one strand on DNA is CTA GCT CCA, what is the
complementary strand? *
Answer:
If the sequence of one strand on DNA is CTA GCT CCA, the complementary strand is GAT CGA GGT.
Explanation:
The DNA molecule has four nitrogenous bases in its structure, two purines —adenine and guanine— and two pyrimidines, cytosine and thymine.
The two DNA strands are linked by hydrogen bonds established between their complementary nitrogenous bases, where a purine is complemented by a pyrimidine.
In the case of DNA, adenine is complemented by thymine and cytosine is complemented by guanine:
A=T
C≡G
In the sequence belonging to a DNA strand CTA GCT CCA, the strand that is complementary would be GAT CGA GGT.
Please help me ASAP or else I’ll fail
The Miller-Urey experiment simulated compounds present in the atmosphere of early Earth, lightning, and the evaporation and condensation of atmospheric water. What other information about the conditions on Earth during this time period would you want to know to improve the experiment?
Answer:
The Miller-Urey experiment was conducted to simulate the conditions on Earth when life arose, and see if a chemical evolution could occur. This experiment was performed without oxygen, because they knew that if oxygen was added, the amino acids would oxidize. In particular, the experiment intended to simulate a volcanic eruption was analyzed.
Thus, particles of water, methane, ammonia and hydrogen were exposed to high temperatures and electric discharges that simulated these eruptions, during a determined period. Later, it was observed that organic compounds had emerged from this exposure, which allowed us to infer one of the hypotheses regarding the origin of life on Earth.
Name and explain in one sentence each the three steps involved in the converting cotton plant to cotton cloth.
Answer:
Ginning
Ginning: The cotton picked up from the plants has seeds in it. The process of removing cotton seeds from pods is called ginning. Ginning was traditionally done by hand. Now-a-days, machines are used in ginning.
Why do hunters kill young deers instead of the old?
Areas undisturbed by people were first regulated in 1964. What law covers these areas?
A) Serengeti Heritage Act
B) Wildland Project Law
C) US Wilderness Act
D) US Park Service Law
Answer:
C)
US Wilderness Act
Explanation:
took the test and got it right!
The branch of biology concerned with the relationships of organisms to one another and their
environment.
A. Ecology
B. Environmental science
C. Demography
D. Sustainability
What organisms provides all the energy for an ecosystem?
Answer:
Plants, algae and photosynthetic bacteria provide an energy source for a majority of the worlds ecosystems.
Explanation:
how does the concept of apoptosis relate to sally cancer cells compared with normal cells ?
Answer:
Apoptosis is defined as a programmed cell death and plays very important role in the removal of cancerous cells. Apoptosis is the process in which cell undergoes several processes and attempt sui-cide. Apoptosis do not cause any harm to human cells as it removes only unwanted cell.
Apoptosis can prevent cancerous cells by telling unwanted growth of cell to self destruct. Cancer cells are formed due to proliferation of cells and ignore the signals of self destruction to prevent apoptosis.
In Sally's case also, cancer cells ignored the signal of apoptosis and a tumor was found in her colon.
5. Macromolecules which are both hydrophobic and hydrophilic and are a major
component of cell membranes are -
Answer:
All phospholipids have hydrophobic tails, consisting of the two hydrocarbon chains, and hydrophilic head groups, consisting of the phosphate group and its polar attachments. Consequently, phospholipids are amphipathic molecules, part water-soluble and part water-insoluble.