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marshall27 [118]
3 years ago
15

Shellfish that was abundant in the Cambrian like a horse crab ​

Biology
1 answer:
enot [183]3 years ago
5 0

Question it’s not clear enough

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Plz answer ASAP
natulia [17]
Casein wrappers// basically made out of a milk fiber, i’m pretty sure it’s edible
8 0
3 years ago
which scientist theory did redi and pasteur's experiments refute? a.the theory of evolution b.the theory of spontaneous generati
Neporo4naja [7]
I believe it was the Cell theory. :)
3 0
3 years ago
Cells that are larger and more complex than prokaryotes are _ cells
leonid [27]

Eukaryotes  are more complex cells, they are found in multi cellular organisms and contain organelles Prokaryotes are unicellular organisms which can also be called protista they only contain cytoplasm, ribosomes and free floating dn a

4 0
3 years ago
"We are very familiar with two things found in large woody plants, wood and bark. The wood is essentially made of ________ and t
valina [46]
<h2>Xylem;phloem and cork</h2>

Explanation:

Wood is mainly known as secondary xylem found in trees

  • Xylem is basically the vascular tissue which is responsible for the conduction of water and nutrients from the roots to shoots and leaves
  • Secondary xylem is formed from secondary growth and is associated with lateral growth and grows from the vascular cambium
  • Its cell walls are thickened by deposition of lignin which provides mechanical support to plants and consists of tracheids and vessels that are shorter and wider
  • In large woody plants secondary xylem get differentiated into heartwood and sapwood

Bark is essentially made of phloem and cork

  • Bark sole purpose is to provide protection to trees
  • The inner bark is produced by vascular cambium which consists of secondary phloem whose innermost layer transports food from the leaves to rest of the plant
  • The outer bark is a dead tissue which is the product of cork cambium
8 0
3 years ago
The absence of which of these will not affect photosynthesis is - oxygen, Carbon dioxide, water, Chlorophyll, light. Give reason
In-s [12.5K]

Answer:

Oxygen

Explanation:

Oxygen is the by product of photolysis during photosynthesis whereby water molecules are split to form protons (H+ ions), electrons and oxygen (by product).

Oxygen is not needed during any of the reactions in photosynthesis and Calvin cycle and will not affect the rate of photosynthesis or possibility of photosynthesis occurring. However, it will affect the process of aerobic respiration instead.

Carbon dioxide is needed in carbon fixation during the Calvin cycle. Without it, 6 carbon sugars cannot be formed.

Water is needed for photolysis to produce protons (maintain the electrochemical gradient) and electrons (to replenish lost electrons)

Chlorophyll are pigments that harvest light energy to excite electrons produced from photolysis of water to be passed down the electron transport chain.

Light is needed as a source of energy to energise the electrons

5 0
3 years ago
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