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serg [7]
3 years ago
7

PLEASE HELP ME ASAP!! IVE BEEN TRYING TO SOLVE THESE FOR 2 HOURS NOW!! :(

Biology
1 answer:
mojhsa [17]3 years ago
8 0
First pic :
plants do not have cell membranes
(plants have BOTH cell membranes and cell walls)

second pic:
ATGC
(opposite strand of the DNA TACG)

third pic:
the second choice
(selectively permeable means only specific molecules could get in and go out)

fourth pic:
option 2
(cellular respiration takes sugar (or food) and makes it into ATP energy. this is what makes us have energy after we eat)

I really hope this helped :))
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Si una adolescente a la que se llamará Laura mide 1.65 m y pesa 70 kg, calcula su IMC.
nikdorinn [45]

Answer:

<h3>BMI (IMC): 25.7 </h3>

<u>Explanation:</u>

Dado que el IMC de Laura es 25,7, tiene sobrepeso.

El sobrepeso puede aumentar el riesgo de ciertas afecciones de salud, incluidas las enfermedades cardiovasculares, la presión arterial alta y la diabetes tipo 2.

7 0
2 years ago
Which of the following characteristics are true for an action potential?
pickupchik [31]

Answer:

I, II, III

Explanation:

A threshold stimulus is a stimulus that is capable to produce a response in excitable tissues such as neurons and muscle fibers. At threshold potential, the outward movement of K+ and inward movement of Na+ become equal to each other. When the potential exceeds the threshold potential, more and more Na+ enter the cell to depolarize it and to allow the opening of Na+ channels. Therefore, to fire an action potential, the threshold must be exceeded.

Conduction of action potential is all or none phenomenon which means that either it occurs or it does not occur. As an impulse is passed by each successive part of an exon, it enters the refractory period during which there is no conduction of nerve impulse. It ensures the one-way conduction of impulse from the cell body to the axon terminal only.

6 0
2 years ago
Which choice lists the groups in order of decreasing variety?
Gnoma [55]
Answer: believe the answer is C.

Hope this helps!
4 0
2 years ago
How was the state of the ecosystem before the wolves were introduced?
mylen [45]

hi !

Explanation:

when wolves were reintroduced , the research has shown that in many places they have helped revitalize and restore ecosystems. They improved the habitat and increase populations of countless species from birds of prey to pronghorn, and even trout.

6 0
2 years ago
What is cyclic and noncyclic photo-phosphorylation​
nadezda [96]

Explanation:

The photophosphorylation process which results in the movement of the electrons in a cyclic manner for synthesizing ATP molecules is called cyclic photophosphorylation. ... During cyclic photophosphorylation, the electrons are transferred back to P700 instead of moving into the NADP from the electron acceptor.

hope it helps

Mark me as brainliest

if you find helpful

:DD

6 0
2 years ago
Read 2 more answers
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