the nucleus of the sieve tube of the plant phloem is lost
Answer:
The sieve tubes of the phloem in angiosperms consist of sieve tube elements or members. These are cells which lose their nucleus, ribosomes, and vacuoles at maturity. They of course have cytoplasm, and it is connected by channels to companion cells (which do have these organelles).
Explanation:
this is the correct answer
"Tall" "purple" and "wrinkled" are examples of?
Tall purple and wrinkled are the examples of Phenotypes.
What are phenotypes?The phenotype is the set of observable characteristics or traits of an organism. The term covers the organism's morphology or physical form and structure, its developmental processes, its biochemical and physiological properties, its behavior, and the products of behavior.
Moreover, the observable characteristics in an individual resulting from the expression of genes; the clinical presentation of an individual with a particular genotype.
Therefore, phenotype examples include earwax type, height, blood type, eye color, freckles, and hair color.
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Mr. Allen wanted to fill balloons for a party. He rented a helium tank that contained 0.4 cubic meters of helium gas. He was concerned that the gas would not fill many balloons, but it filled 27 large balloons! Why was the small tank of helium gas able to fill so many balloons?
A. Helium mixed with air when it came out of the tank.
B. The helium expanded to fill its new containers, the balloons.
C. Helium molecules are very small in size.
D. The volume of gas in the balloons equaled the volume of gas in the tank.
Given what we know about the behavior of gases like helium, we can confirm that the small tank of helium was able to fill so many balloons because the helium expanded to fill its new container, which is the balloon.
Helium is a chemical element known as a noble gas. Like all other elements in a gaseous state, the atoms that comprise helium are spaced apart. This allows the gas to be compressed, a property that manufacturers of the gas take advantage of since they can compress a large amount of gas into a small container.
This is precisely what is happening in the question. The small tank of helium, despite being small in size, contains a large amount of compressed helium gas. Therefore, once it is released from the container, the gas expands to fill its new container, which in this case is the balloons, because of this, a relatively small tank of helium was able to fill many large balloons.
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Which of the following is associated with plates moving away from each other? a. Rifts b. Subduction zones c. Faults d. All of the above.
Answer:
a. Rifts
Explanation:
A fault (c) happens at all plate boundaries, so while this is true, it is not the most correct. A subudction zone (b) is where Earth's tectonic plates dive down into the mantle, so this does not answer our question. A rift, in general, is a crack, split, or break in something. A rift in plate tectonics is when plates are moving apart from each other, caused be tension, so a is our answer.
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather
Answer:
A
Explanation:
the answer is A
All members of a species living in the same location are called a
population
genus
community
ecosystem
Answer:
population is the best answer
visceral reflex arcs differ from somatic in that ________.
Explanation:
somatic reflex occurs in skeletal muscles whereas, the visceral reflex occurs in soft tissue organs.
The difference between visceral reflex arcs and somatic reflex arcs is that visceral turns require two motor neurons.
What are visceral reflex arcs?For instance, somatic reflexes require a direct link between the skeletal muscle and the ventral horn of the spinal cord. The central neuron of a visceral reflex sends a signal to a ganglion, which then sends another signal to the target effector.
While somatic reflexes are aware, visceral reflexes are unconscious. Compared to somatic reflexes, visceral reflexes entail a somewhat slower reaction time.
Visceral reflex arcs use two motor neurons along with glandular tissue and non-skeletal muscle to carry out a reflexive reaction. Skeletal muscles only have one motor neuron, therefore somatic reflex arcs include them.
Therefore, two motor neurons are involved in visceral arcs, which differ from somatic.
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how is glaciers melting in alaska a problem for humans
Answer:
The water will rise
Explanation:
We can drown
in classical conditioning, stimulus generalization occurs when an organism responds
Answer: In stimulus generalization, an organism responds to new stimuli that are similar to the original conditioned stimulus. For example, a dog barks when the doorbell rings. He then barks when the oven timer dings because it sounds very similar to the doorbell
What is the primary function of the
skeletal system?
A. Providing shape and support
B. Removing waste from the
body
C. Circulating blood throughout
the body
D. Producing offspring
Answer:
The primary function of the skeletal system is by (A) Providing shape and support.
I hope this helped at all.
two other components of blood
It has four main components: plasma, red blood cells, white blood cells, and platelets. Blood has many different functions, including: transporting oxygen and nutrients to the lungs and tissues. forming blood clots to prevent excess blood loss.
While eating dinner, Isabelle starts choking on a grape. She can't cough, talk, or breathe. What should her mother do to help her?
*Heimlich maneuver
(or buy a LifeVac device to keep in your car for emergencies)
Answer:
c. Do the Heimlich maneuver.
Explanation: is correct. post protected