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hram777 [196]
3 years ago
8

Which of the following provides the best description of active transport of materials across the cell membrane? Active transport

does not require energy and moves materials from areas of relatively higher to lower concentration. Active transport does not require energy and moves materials from areas of relatively lower to higher concentration. Active transport requires energy and moves materials from areas of relatively lower to higher concentration. Active transport requires energy and moves materials from areas of relatively higher to lower concentration.
Biology
1 answer:
Afina-wow [57]3 years ago
7 0

Answer:

Active transport requires energy and moved materials from areas of relatively lower to higher concentration

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Humoral immunity involves ________ cells and ___________
jarptica [38.1K]

Answer:

Humoral immunity involves <u>B cells</u> and<u> recognize antigens or pathogens in the lymph or blood.</u>

Explanation:

Humoral immunity is defined as the immunity which is mediated by several macromolecules presnet in the extracellular fluids such as antibodies, certain antimicrobial peptides, and  complement proteins.

Humoral immunity allows to distinguishes two groups of foreign substances. it involves <u>B cells</u> and<u> recognize antigens or pathogens in the lymph or blood. </u>

Humoral immunity begins when an antigens bind to B cells.  Interleukins or helper T cells provides a secondary signal to the B cells that activates a B cell and allows B cell proliferation.  which roduces produce plasma cells. The plasma cell then produces antibodies which are identical to the specific antigen. The antibodies are the released and circulate through the body, binding to antigens.  B cells the further produces memory cellss for future immunity.

So, Humoral immunity involves <u>B cells</u> and<u> recognize antigens or pathogens in the lymph or blood.</u>

8 0
4 years ago
During a lunar eclipse, what blocks the light from hitting the moon's surface?
Allushta [10]

Answer:

Lunar Eclipse: The moon moves in an orbit around Earth, and at the same time, Earth orbits the sun. Sometimes Earth moves between the sun and the moon. When this happens, Earth blocks the sunlight that normally is reflected by the moon. (This sunlight is what causes the moon to shine.)

Explanation:

7 0
3 years ago
What is the sequence and polarity of the dna strand complementary to the strand 5' aaatgtccatgc 3'?
Natalka [10]

DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a person's body has the same DNA

DNA sequencing refers to the general laboratory technique for determining the exact sequence of nucleotides, or bases, in a DNA molecule

5' AAATGTCCATGC 3'

3' -TTACAGGTACG -5'   is the sequence and polarity of the dna strand complementary to the strand 5' aaatgtccatgc 3'.

To know more about DNA sequence here

brainly.com/question/14923432

#SPJ4

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2 years ago
Which of the following distributes daughter chromosomes to daughter nuclei during the process of cell division?
FrozenT [24]

Answer:

Mitosis

Explanation:

During mitosis, a eukaryotic cell undergoes a carefully coordinated nuclear division that results in the formation of two genetically identical daughter cells.

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3 years ago
-(6)^-1
Anvisha [2.4K]
After 9 hours it will be 4000
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