Epidermis:1. Single layered group of cells that cover plant leaves, flowers, root and stem. 2. It is permeable in nature. Protect against water loss, gas exchange and absorb water and minerals.
Cork:1. The cork is a water proof protective layer (bark) present on the cork trees. It consist of dead cells. 2. Impermeable in nature.
b. are typified by tweezers or forceps
c. have load at one end of the lever, fulcrum at the other, and effort applied somewhere in the middle
d. in the body can operate at a mechanical advantage or mechanical disadvantage, depending on specific location
Answer: d. in the body can operate at a mechanical advantage or mechanical disadvantage, depending on specific location.
Explanation:
A first-class lever is defined as the force in which fulcrum is present in the center and the load and effort on each side of the fulcrum. First class lever moves over a large distance to move the load to a smaller distance.
First-class lever can be operated at mechanical advantage or disadvantage that it can aid in work by changing the direction of the force and by increasing the efficiency. As the the fulcrum is between the load and the effort so the length of the effort arm divided by the length of the effort arm.
If the fulcrum is closer to the effort, it will operated at mechanical disadvantage and vice versa.
Example of first class levers includes scissors, a claw hammer, a see-saw and a weighing balance.
Hence, the correct option is D.
B. decrease the production of aldosterone
C. decrease arterial blood pressure
D. decrease water absorption
Answer: A. constrict arterioles and increase blood pressure
Explanation:
Angiotensin II, is a hormone that binds to many receptors in the body to affect several systems. It can cause constricting of the blood vessels, increases thirst, stimulates the secretion of the hormone that is involved in the fluid retention in the body.
The angiotensin may cause vasoconstriction directly and indirectly. When the angiotension II levels are increased in the blood due to the activation of the renin-angiotension-aldosterone system, many arteries experiences the vasoconstriction so as to maintain the blood pressure. This process reduces the flow of blood to the kidneys.
Angiotensin II primarily functions to constrict arterioles and increase blood pressure, making option A the correct answer. It does this by constricting blood vessels, thereby increasing peripheral resistance and blood pressure.
The function of angiotensin II is predominantly to A. constrict arterioles and increase blood pressure. Angiotensin II, a powerful vasoconstrictor, plays a crucial role in maintaining blood pressure by constricting the arterioles to increase peripheral resistance, thereby increasing blood pressure. It is a part of the renin-angiotensin-aldosterone system, which helps regulate the body's blood pressure and fluid balance. So, decreased production of aldosterone, decreased arterial blood pressure, or decreased water absorption are not primary functions of angiotensin II. Its primary function concerns blood pressure regulation.
#SPJ6
A : Femur
B : patella
C : tibia
B. An operon is a region of DNA that codes for sugar-metabolizing enzymes.
C. An operon is a region of DNA that codes for a series of functionally related genes under the control of the same promoter.
D. An operon is a region of DNA that consists of a single gene regulated by more than one promoter.
I say b but I’m not sure
Answer: C
An operon is a function portion of a DNA strand that contains a cluster or genes that are controlled under one promoter. This is found in an bacteria or cell and controls protein synthesis. It helps conserve the energy of the cell by only producing proteins when necessary.