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tekilochka [14]
3 years ago
9

What is a hormone?

Biology
1 answer:
patriot [66]3 years ago
8 0
Is a type of amino acid
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Movement of substances that requires the expenditure od atp molecules is called
Umnica [9.8K]

Movement of substances can be classified as active transport of passive transport.

In passive transport movement of substances across the membrane occurs without the expense of ATP. It occurs usually along the concentration gradient i.e., from high concentration to low concentration.

In active transport, movement of substances require energy in the form of ATP because it happens against the concentration gradient i.e. from low concentration to high concentration.

5 0
3 years ago
Which statement BEST describes a herbivore?
timofeeve [1]
The correct answer is an animal the consumes plants
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3 years ago
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Knowledge of the driver mutations underlying cancer has led to targeted therapeutics, such as the protein kinase inhibitor imati
garik1379 [7]

Answer:

<u>C) proteins with gain-of-function mutations</u>

Explanation:

<u>Gain-of-function mutations: </u>In biology, the term "gain-of-function mutation" is described as one of the different types of mutation in which the altered or changed "gene product" consists of an entirely new pattern or molecular function associated with gene expression. However, the "gene-of-function mutations" are being always considered as "Semidominant or Dominant".

<u>In the question above, the correct answer is option C.</u>

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3 0
3 years ago
The veins of leaves are _____. i) composed of xylem and phloem ii) continuous with vascular bundles in the stem and roots iii) f
raketka [301]
Hey there :)

All the options you have given are applicable. 

Because xylem and phloem are essentials as they are the veins of the leaves. They are bundled together in thin strands. They allow the movement of water and nutrients. 

The veins of leaves are finely branched to be in close contact with photosynthesizing cells as they need to store food.


5 0
3 years ago
How does blood defend against pathogens and toxins
Darina [25.2K]

Blood carries immune system cells, known as white cells or leukocytes. Some examples of white cells are phagocytes and lymphocytes.

Phagocytes ingest and dissolve pathogens, as well as strange particles or dying cells.

Lymphocytes are divided into T cells, B cells, and natural killer cells (NK). B cells produce antibodies to respond to foreign cells, T cells attack pathogens using enzymes and other non-antibodies responses, while NK cells combat tumors and cells infected by viruses.

5 0
1 year ago
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