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2 years ago

How does the life cycle of a praying mantis differ from the life cycle of a beetle?

1 answer:

3 0

A praying mantis life cycle does not include the pupa stage. The adult female praying mantis lays 100 to 400 eggs after fertilization. The eggs are laid safely on a firm leaf or stem with a liquid that hardens to be a protective sac structure known as ootheca. The ootheca is a protective casing (very hard and able to survive extreme weather changes) in which the eggs will stay throughout the winter. In mid-spring when the temperatures are warm, the nymphs will hatch when the egg cases crack.

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Chemical reactions convert to . In nonliving systems, the presence of a(n) allows the reaction to proceed very quickly and have

Dafna11 [192]

<h2>Answer:</h2>

reactants,  products

catalyst

activation energy

enzymes

<h2>Explanation:</h2>

Chemical reactions convert reactants to products. In nonliving systems, the presence of a(n) catalyst allows the reaction to proceed very quickly and have a lower activation energy. In living systems, this function is carried out by proteins called enzymes.

7 0

3 years ago

Which of the following statements about phospholipids is TRUE? A Option A: Each one has two fatty acid chains and the glycerol b

Diano4ka-milaya [45]

Answer:

Each one has two fatty acid chains and the glycerol backbone is bonded to a small polar group.

Explanation:

Phospholipid is a unique form of lipid. The bonding of the glycerol backbone to the polar phosphate group makes phospholipid to have dual solubility unlike general triglycerides.

The polar head is said to be hydrophillic that is water loving, while the two carbon chains that retained lipid features are hydrophobic water hating.

Therefore if a phopholipid is placed in water, in relation to its functions as component of cell membrane, it forms a bi-layer in which the water loving portion hydrophilic head points into the surrounding watery medium, while the hydrophobic layer points inwards far away from the watery medium into the internal cellular layer to form an impermeable barrier to hydrophilic (polar) substances.

This forms the basis of the phospholipd bilayer of the cell membrane. And it controls the permeability of the cell membrane to influx substances into the cells.

3 0

3 years ago

When your Math teacher was handing out the test, you noticed that your respiration rate and heartbeat increased, your palms got

Papessa [141]

Answer:

My pretest behaviors were triggered by the sympathetic nervous system, while my body returned to its normal state by the way of the parasympathetic nervous system, after the test.

Explanation:

The sympathetic nervous system and the parasympathetic nervous system are part of the autonomic nervous system. The main function of the autonomic nervous system is to regulate the heart, kidneys, and liver which are not under voluntary control. The regulation of the body’s unconscious actions is executed through the sympathetic and the parasympathetic nervous system.

Upon exposure to stressors or threats, the sympathetic nervous system is triggered. Epinephrine and norepinephrine are then released, causing acceleration of the heart, constriction of blood vessels, increase in blood pressure, profuse sweating and other related responses against stress. The sympathetic nervous system controls all these involuntary responses that could be termed “fight-flight-or-freeze” response.

On the other hand, the parasympathetic nervous system initiates what is termed “rest and digest” response, which occurs immediately after the “fight-flight-or-freeze” phase response to stress is over. The body is returned to its normal state by the parasympathetic nervous system. The parasympathetic nervous system releases acetylcholine, which regulates the function of the body during a period of rest or recuperation.

5 0

3 years ago

Last year farmers discovered that a small amount of a new insecticide rapidly killed a worm species that was damaging their corn

den301095 [7]

Answer:

Worms that survived produced offspring that were resistant to the insecticide.

8 0

3 years ago

Which is an example of a pioneer species?

hammer [34]

Answer:

lichen

Explanation:

Common examples of pioneer species include bacteria, lichen, mosses, and fungi.

3 0

2 years ago

Read 2 more answers