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tatiyna
3 years ago
7

Which of the following is an example of a density-independent factor limiting population growth? A. A forest fire that was cause

d by lightning B. The presence of predators C. An outbreak of wasting disease in elk D. Competition for food
Biology
2 answers:
posledela3 years ago
7 0
 presence of predators
Elanso [62]3 years ago
7 0

Answer;

A forest fire that was caused by lightning

Explanation;

-Density-independent factors are factors such as weather and climate, that exert their influences on population size regardless of the population's density. In contrast, the effects of density-dependent factors intensify as the population increases in size.

-Density-independent limiting factor have the same effect regardless of population size, for example - If there is a wild fire, the fire destroys all the animals in the forest regardless of how many animals there are. The fire does not care how big the population is.

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Which of the following is a traditional human use of microorganisms? Select one: a. Baking bread b. Treating water and sewage c.
Vladimir79 [104]

Answer:

Baking bread

Explanation:

Over time, microorganisms have been found beneficial in nature. most significantly in the fermentation process of bread baking.  the main micro organism in bread making traditionally is the yeast. Yeast is a microbe, when the yeast feeds on sugar it ferments it and it converts the sugar into carbon dioxide and ethanol. The function of the yeast in bread making is that it causes bread to rise.

3 0
3 years ago
Neurotransmitters are ________. Group of answer choices chemicals that cross the synaptic gap and bind to receptors on another n
Hoochie [10]

Answer:

chemicals that cross the synaptic gap and bind to receptors on another neuron

found only in the central nervous system (the brain and spinal cord)

Explanation:

Neurotransmitters are defined as the chemicals that is transported from a nerve cell across the synaptic gap to the receptor of another neuron or a target cell such as a gland cell or a muscle cell.

Neurotransmitters are generated in the central nervous system (the brain and spinal cord) and are stored in synaptic vesicles.

"Hence, the correct answer is:

chemicals that cross the synaptic gap and bind to receptors on another neuron

found only in the central nervous system (the brain and spinal cord)".

8 0
3 years ago
How long will it take for the Jefferson Memorial to erode completely?<br><br> 30 points!
balandron [24]

No one knows. There's no confirmation date at the moment. As that comment said, only time will tell.


6 0
3 years ago
Read 2 more answers
A forensic odontologist examines the teeth of a skull and finds no baby teeth, no wisdom teeth, scarring in the rear jawbone, no
denis23 [38]
The correct answer is letter B, the age range of the skull is less than 10 years old. Teeth are also a form of bone that develop within the skull. Its structure helps archaeologists determine the age of fossils that they dug up from the soil. Children lack some prominent features compared to adults because their bodies are still growing and developing into maturity. 
4 0
3 years ago
Read 2 more answers
How do the hormones of the pancreas maintain homeostasis?
faust18 [17]
Hormones glucagon and insulin are produced in the alpha and beta cells respectively in the Islet of Langerhan in the pancreas. They are involved in the negative feedback system of blood glucose regulation in homeostasis.

GLUCAGON: when there is a low blood glucose concentration, the pancreas detect this and alpha cells produce and release glucagon. Glucagon causes the cells of the body to absorb less glucose from the blood. It also inhibits the process of converting glucose into glycogen (glycogenesis) and cause gluconeogenesis (process of converting amino acids/proteins and lipids/fats into glucose) and glycogenolysis (conversion of glycogen to glucose). Finally, glucagon decreases the rate of respiration so less glucose is required.

INSULIN: when blood glucose is high, insulin is released. Insulin binds with cell surface receptors of cells and activates the enzymes attached to the receptor. The enzymes cause a conformational change in the structural proteins that surround glucose transport protein containing vesicles, causing them to move out of the way so the vesicles migrate up to the cell membrane and glucose transport proteins can fuse with it. Thus, more glucose can be taken in by cells. Insulin also cause glycogenesis (converting glucose into glycogen) and inhibits gluconeogenesis and glycogenolysis.

Basically insulin decreases blood glucose concentration (eg. after eating) and glucagon increases it (eg. skipping breakfast in the morning)
6 0
3 years ago
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