Answer:
Xylem and phloem are called complex tissues because they are made up of more than one type of cell working together as a unit. The xylem transports H2O and minerals upward from the roots to the leaves, and is composed of tracheid cells which are dead at maturity (no active nucleus, makes the tree stem hard). If plants don't have xylem, they will stay lower to the ground as it is responsible for making the tree grow upward. The ends of the xylem tubes are tapered (pointed), materials are passed along one cell at a time, and the tubes are narrow and continuous. The phloem transports sugars and proteins downward from the leaves to the stems and storage roots. The cells that make up the phloem are called sieve tubules and companion cells. The companion cells have the nucleus and the sieve tubules contain the cytoplasm.
Explanation:
My teacher helped us remember using the phrase "phloem down the river" because it sounds like 'flowing down the river' (to help remember that phloem transports downward and xylem transports upward.)
Growing food in urban areas could improve food security worldwide.
True or false?
Answer:
Yes, it could be a possibility. (True)
Which of the following do cells obtain from nutrients in food?
A. lithium
B. helium
C. energy
D. oxygen
Design a plan that can be used by oil workers everywhere to save ecosystems
Answer:
Oil workers activities involved in the exploration of crude oil and natural gas creates pollution which affects the ecosystem negatively. The various pollutions cause the death of plant and animal life both on land and in water bodies.
The oil workers should be more careful in their activities to prevent oil spillage as much as possible and if there is any at all then there should be adequate measures in the cleaning it up efficiently through biological and harmless chemicals.
How is a genetic switch different than a gene? How are they the same
What happens when muscles in the frogs body wall contract?
The law of April 6 1830 signaled a major shift in
Answer:
This isn't biology LOL. But "the implementation of the American policy of westward expansion."
Explanation:
What molecule makes the trunk of a tree sturdy?
O A. Fructose
O B. Disaccharide
C. Cellulose
O D. Glucose
Answer:
C. Cellulose
Explanation:
Raising more sustainable fish would require choosing fish species such as____?
A. Tilapia that eat algae and plants
B. Tuna that eat other fish
C. Catfish that eat fishmeal
D. Carp that eat fertilizer
E. Trout that can be easily caught
Answer:
A tilapia that eat algae and plants
Compared to other nations, Americans spend the highest percentage of their disposable income on food.
True or False?
Answer:
The answer is True.
fruit is absent in ?
a.Mango
b.rose
c. pine
d.sunflower
Answer: C: Pine
Explanation: Pine belong to the gymnosperms ( Naked seed plants) group, a group of plants with flower that has no ovary hence no fruit. The seeds are borne naked on scaly structures or leaves surface. Other examples in this group are Conifers, Cycads, Ginkgo e.t.c
match the phylum with the animal.
Answer:
1 - D
2 - A
3 - C
4 - B
Explanation:
5
The outermost layer of the sun is called the
corona
chromosphere
ionosphere
photosphere
Which statement best describes Mendelian or complete dominance?
When both the dominant and recessive allele shows.
When the dominant and recessive alleles mix to form a third phenotype.
When the dominant trait or allele completely masks the recessive allele.
Answer:
When the dominant trait or allele completely masks the recessive allele
Explanation:
Mendelian or complete dominance is a relationship of genes in which one allele of a gene pair that codes for a trait expresses itself over the other allele of the gene pair. The allele of the gene pair that expresses itself over the other is the dominant trait or allele, which completely mask the expression of the other allele called the recessive allele or trait.
In the pea plant experiment conducted by Mendel, complete dominance can be seen. For example, for seed color of pea plant, allele for yellow seed color was dominant over allele for green seed color.
How is DNA used as evidence for evolution?
Answer:
Hope this helps!!!!!! I tried my best to answer!
Darwin proposed that evolution could be explained by the differential survival of organisms following their naturally occurring variation—a process he termed "natural selection." According to this view, the offspring of organisms differ from one another and from their parents in ways that are heritable, which happen because of the change in DNA!
Explanation:
Answer:
All species have the same genetic code.
3. (4pts) A constraint is a limitation or condition that must be satisfied by a design. For example, you may onl
be able to use certain materials, or you might want the device to operate at a certain speed.
What was a constraint (a limitation or a condition) in this version?
Answer:
As seen in the question above, "constraint" is a word that indicates a limitation or condition. In this case, we can say that the "restriction" is an imposition to a limit under a given situation, and it can also mean an imposition of the free execution of an activity, skill and even limitation and a conditioning factor to a certain freedom.
What are the basic units of protein macromolecules?
When are two populations likely to have very similar allele frequencies?
A. If the selective pressures are different
B. If there is a high mutation rate
C. If there is a large amount of genetic drift
D. If there is a large amount of gene flow
Answer:
c). If there was a large amount of genetic drift.
If the price of gene drift is excessive enough, then two populations will have equivalent allele frequencies and consequently can be taken into consideration as a single powerful population.
What causes allele frequencies to live equally?Allele frequencies continue to be constant over the years due to the following: there is no considerable price of a brand new mutation. individuals with all genotypes are similarly able to mate and pass on their genes; that is, there's no choice against any precise genotype.
What are two impacts of allele frequencies of a population?The natural choice, genetic drift, and gene go with the flow are the mechanisms that purpose modifications in allele frequencies through the years. while one or greater of those forces are appearing in a populace, the populace violates the Hardy-Weinberg assumptions, and evolution occurs.
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What method is used when you try several different solutions to see what
works?
A wet mount slide from a sample of Elodea leaf cells and a slide from a sample of red blood cells were initially examined using a light microscope. The remaining
portions of the two cells samples were then placed into a 20% sucrose solution. After 30 minutes, the cells were again examined using a light microscope. Which
statements best describes their appearance?
Your answer:
A. The leaf cells had undergone plasmolysis while the red blood cells had shriveled.
B. The leaf cells were swolle and turgid while the red blood cells remain unchanged.
C. Both the leaf cells and the rat blood cells had swollen and burst.
Answer:
B
Explanation:
The leaf cells were swolle and turgid while the red blood cells remain unchanged.
What else are extreme sports sometimes called?
O A. Action sports
O B. Adventure sports
O C. Adrenaline sports
D. Both A and B
Environmental damage due to increased pesticide use
Answer:
I would say A
Explanation:
Why a specialized cell does not undergo mitosis?
Answer:
Because Not all cells divide
Explanation:
A scientist decides to study the effect of salt on a particular type of bacteria. Arrange the steps of the scientific method in the correct order to
show how the scientist would proceed with his work.
The scientist asks the question,
Does salt help the growth of
these bacteria?
>
The scientist puts the bacteria in
three different environments:
high salt, medium salt, and low salt.
A microbiologist notices that
some bacterial species thrive
in salt water environments.
The scientist forms a hypothesis
that higher concentrations of salt
may increase the growth of these
types of bacteria.
The scientist publishes his report
in a scientific journal.
Answer:
yes it does help the growth of bacteria.
The correct order of the steps of the scientific method to show how the scientist would proceed with his work are: 2 - 3 - 4 - 5 - 6 - 7
What is the scientific method?A microbiologist notices that some bacterial species thrive in salt water environments.The scientist asks the question, Does salt help the growth of these bacteria?The scientist forms a hypothesis that higher concentrations of salt may increase the growth of these types of bacteria.The scientist puts the bacteria in three different environments: high salt, medium salt, and low salt.The scientist collects and analyzes the data obtained from the experiment.The scientist draws a conclusion based on the results of the experiment.The scientist communicates the results and conclusions to the scientific community by publishing a report in a scientific journal.
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Most scientists agree that saturated fats contribute to high levels of “bad” cholesterol, while monounsaturated fats and polyunsaturated fats lower this type of cholesterol. The table below shows data about fats in some common foods.
Food (14 g) Saturated fat (g) Monounsaturated fat (g) Polyunsaturated fat (g)
Canola oil 1.0 8.9 3.9
Margarine 1.6 5.4 3.4
Olive oil 1.9 9.9 1.4
Lard 5.0 5.8 1.4
Butter 7.9 3.7 0.5
Joyce and Linda are identical twins who are 50 years old and enjoy exercising daily. Joyce avoids eating any dairy or animal products and eats granola made with canola oil for breakfast. Linda prefers rich foods, and eats bacon, eggs, and buttered toast each morning. Which statement describes a logical inference that can be made from the provided information?
a)Butter has higher levels of saturated fats in it than canola oil.
b)Linda and Joyce both have high levels of “bad” cholesterol.
c)Butter contains a small amount of polyunsaturated fats.
d)Linda has a higher level of “bad” cholesterol than Joyce.
Answer: D: Linda has a higher level of "bad" Cholesterol than Joyce
Explanation: From the first sentence Saturated fat contributes to high level of bad cholesterol. Buttered food, bacon ( Lard) are significantly high in saturated fat which contributes to high level of bad cholesterol and that's what Linda is eating. Joyce on the other hand avoids animal products and feeds on granola from Canola oil which is low in saturated fat.
The logical conclusion base on this diet is Joyce has low level of bad cholesterol while Linda has high level of bad cholesterol
Answer: THE ANSWER IS D :)
Explanation:
Which community has the greater species diversity?
Select one:
Community Y, because the total number of individuals is greater
Community Y, because the community is richer
Community X, because the distribution of species is more even
Community X, because the community is richer
Answer:
Community X, because the distribution of species is more even
Explanation:
Anna applies a force of 84n Nto lift her baby nephew 2.0 m. How much work
does Anna do? Answer
Answer:
168 J
Explanation:
Work can be calculated using the following formula.
w=f*d
where w is work, f is force, and d is distance.
Anna applied a force of 84 Newtons, and lifted the baby 2.0 meters.
f=84 N
d=2 m
Substitute these variables into the formula.
w=84 N* 2 m
Multiply
w=168 N-m
A N-m is the same as a Joule, or J.
w= 168 Joules
Anna does 168 Joules of work.
1. Did your buoy move as you expected? Explain why or why not.
Which features did you include in your answer? Check all that apply.
It’s specific and testable.
It can be used to form a hypothesis.
It is not based on an opinion or values.
It does not relate to the supernatural.
Answer:
Well, it's based on your answers, honestly. you did not post them
Which type of tissue carries messages?
A. Nervous tissue
B. Connective tissue
C. Muscle tissue
D. Epithelial tissue
SUBN
Answer:
Nervous tissue
Nervous tissue is responsible for carrying messages throughout the body. It is made up of specialized cells called neurons, which are able to transmit electrical signals. These signals allow the body to respond to stimuli and coordinate its movements. Hence option A is correct.
Connective tissue provides support and structure to the body. It is made up of cells that are embedded in a matrix of fibers. The fibers can be made of collagen, elastin, or other proteins. Connective tissue can be found in many different parts of the body, including the bones, muscles, and skin.
Muscle tissue is responsible for movement. It is made up of cells that can contract and relax. There are three types of muscle tissue: skeletal muscle, smooth muscle, and cardiac muscle.
Skeletal muscle is attached to bones and is responsible for voluntary movement. Smooth muscle is found in the walls of internal organs and is responsible for involuntary movement. Cardiac muscle is found in the heart and is responsible for pumping blood.
Epithelial tissue covers the body and lines internal organs. It is made up of cells that are tightly packed together. Epithelial tissue protects the body from infection and helps to regulate body temperature.
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What is the original source of energy for gasoline?
O plants
O Sun
O petroleum
O fossil fuels
Answer:
Sun
Explanation: