Actions that are reactions to a stimulus are called _____________________.

Answers

Answer 1
Answer:

The answer is reflex actions.


A reflex action is an involuntary and rapid reaction to a stimulus. So, when a receptor detects a stimulus, the information is sent to relay neuron through a sensory neuron. Relay neuron sends information to the effector through a motor neuron and effector produces a response.


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Lack of vitamin C in the diet interferes with the ability of fibroblasts to produce collagen. What effect might this interference have on connective tissue?

Answers

Answer:

Answer is given below:

Explanation:

Function of vitamin C is healing wounds. Its deficiency causes multiple effects on connective tissue. It decreases the amount of collagen synthesis and angiogenesis and increases the amount of fibroblast and also increases capillary fragility and definitely because of its deficiency wound will not be healed properly or may not be healed.

Which of these processes are necessary for roots to be able to take up water and minerals?a. Passive transport and diffusion
b. Active transport and osmosis
c. Respiration and evaporation

Answers

Roots of plants take up water and minerals from the roots via the medium of passive transport and diffusion. The facilitated diffusion of mineral ions into the root cells requires specific channel proteins in the membranes. The uptake of mineral ions in the plant cells is influenced by electrical gradient, concentration gradients, ionic balance and pumping of hydrogen ion.

As part of your summer research project, your professor has asked you to perform comparative genomic hybridization (CGH). He gives you DNA from one person who you know nothing about (referred to as the test subject). You use this DNA as a template to make green fluorescent DNA. You also make red fluorescent DNA with DNA from a control person. When you perform CGH, you are surprised to find that the ratio of green to red fluorescence is 2 along all of chromosome 18. You conclude:____________.A. the control person must be missing chromosome 18.B. the test subject is likely to have cancer.
C. the test subject likely has Edward Syndrome.
D. the test subject likely has Down Syndrome.

Answers

Answer: Option C

Explanation:

Edward syndrome is also called as trisomy which is a genetic disorder. This disorder is caused due to the third copy of the all the part of the chromosome number 18.

The babies that are born is small and have heart defects. They have overlapping fingers.

The ultrasound cannot detect the problem but the process of amniocentesis can confirm the syndrome.

((IM CLUELESS HELP PLS)) In most ecosystems, nitrogen is primarily stored in living and dead organic matter. This nitrogen must be chemically modified from ammonia (NH3 ) to ammonium salts (NH4+ ) in the soil, so that it may be once again incorporated into plant tissues. This conversion is carried out by bacteria and fungi through the process of A) decomposition.


B) denitrification.
Eliminate

C) leaching.


D) transpiration.

Answers

Correct answer: A). Decomposition

Decomposers are the organisms that are known to break down the dead and decayed animals and plants, and the process is known as decomposition. They are also known to help in the breakdown of a waste of other organism.

They are considered important for the ecosystem, as if they were not there in the ecosystem then the plant would not be able to get essential nutrients that are necessary for their growth. Because it is the decomposers who help in the recycling of carbon and the nitrogen cycle.

Example: bacteria, fungi




the answer  is A.  decomposition

In the California Mojave Desert, an energy company is building a large solar­power facility. It is expected to produce enough power for 140,000 homes and also cut carbon dioxide emissions by 500,000 tons a year. The facility will be built on 4,050 acres of wildlife habitat, which is near a protected refuge for a species of desert tortoise. The decision to build this power plant is most likely based on

Answers

Several factors have been considered before the constructionwas started. This includes the wildlife in the area and certain precautionshave been made for their benefit and protection. This part of the Mojave Desertwas chosen because it has the best potential in absorbing the sun’s energy raysat anytime of the year thus giving the assurance that the solar power supplywill be enough all year round.

The control center of a cell is the _____.mitochondrion
nucleus
lysosome
cytoplasm

Answers

The answer to this question is B, nucleus.

Final answer:

The control center of a cell is the nucleus. It oversees all the cell's functions because it contains the cell's DNA. Other cell components, like the mitochondrion, lysosome, or cytoplasm, have different roles.

Explanation:

The control center of a cell is the nucleus. The nucleus oversees all the functions of the cell, essentially acting like its brain. This is because it contains the cell's DNA, the instructions for every task the cell needs to perform. Other components of the cell, like the mitochondrion, lysosome, or cytoplasm, have different functions. For example, the mitochondrion is responsible for energy production, the lysosome for waste disposal, and the cytoplasm acts as a medium for cellular processes.

Learn more about Cell Nucleus

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