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Andreas93 [3]
3 years ago
5

How do hormonal contraceptives (usually) work? Check all that apply.

Biology
1 answer:
Irina18 [472]3 years ago
6 0

Answer:yes and no there is no context just yes

Explanation:

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A drug will prevent an action potential if it ____.​ a. ​lowers the threshold of the membrane b. ​blocks the movement of potassi
djverab [1.8K]

It prevent an action potential if it blocks the movement of sodium across the membrane.   The primary feature of a neuron that prevents the action potential from traveling back from where it just passed is the absolute refractory period. It holds an action potential if it blocks the movement of sodium across the membrane.   

6 0
3 years ago
Name some of the traits mendel studied with his pea plants.
Scorpion4ik [409]
Gregor Mendel was an important scientist, considered to be the founder of the science of genetics. His experiments on the crossbreeding of plants and the passing down of favourable traits, led him to establish the laws of Mendelian inheritance. He was using pea plants for his experiments and he was studying seven different pea traits: pea shape and color, pod shape and color, flower color, plant size and position of flowers.

7 0
4 years ago
When a pregnant woman ingests substances, the interaction of one substance with another often ______ the effects of one or both?
Anestetic [448]
Increases

In women that are pregnant, the effects of substances are far more adverse than they would be in a normal person, especially if the woman is taking more than one. For this reason, it is important for pregnant women to take as much care as possible of their bodies and refrain completely from smoking and drinking alcohol, as both of these activities are detrimental towards the fetus's health. Pregnant women should even avoid second hand smoke from cigarettes.
3 0
3 years ago
The hydrosphere, lithosphere, biosphere, and atmosphere are all examples of __________.
vlada-n [284]

Answer:

The answer is A, open systems!!

Explanation:

all systems on earth are open, except for the earth itself.

6 0
3 years ago
Eons are the broadest category of geologic time, and we live in the Phanerozoic eon. The Phanerozoic eon is further divided into
igor_vitrenko [27]

Answer:

D. Mass extinction events separate the three eras from each other

Explanation:

The Phanerozoic represents an eon, and it is the most recent one. It is further divided into three eras, Paleozoic, Mesozoic, and Cenozoic. The division between the tree eras is because of mass extinction events. The Paleozoic and Mesozoic era are divided by the Permian-Triassic mass extinctions. The Mesozoic and Cenozoic are divided by the Cretaceous-Paleogene extinction. The Cenozoic era is still in existence, as there hasn't been a mass extinction of a magnitude big enough so far.

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