B.cell wall
Cellulose is an important structural component of the primary cell wall of green plants.
Answer:
4 Fe + 3 O₂ → 2 Fe₂O₃
Explanation:
Let's start with the oxygen.
Reactants - 2
Products - 3
What number do 2 and 3 have in common? 6.
Put a 3 in the reactants and a 2 in the products to balance the oxygen.
Fe + 3 O₂ → 2 Fe₂O₃
Now let's look at the iron.
Reactants - 1
Products - 4
Put a 4 in the reactants to balance the iron.
4 Fe + 3 O₂ → 2 Fe₂O₃
The equation is balanced. Hope that helps.
Answer:
30
Explanation:
The seed of an angiosperm is formed as a result of fertilization (fusion of sperm in pollens and the ova from ovary). According to the question, the cells of the seed which will grow into the plant contains 20 chromosomes. Seeds of angiosperms contain a tissue called ENDOSPERM that forms as a result of the unique DOUBLE FERTILIZATION in angiosperms. It occurs when one haploid sperm cell fuses with two haploid polar nuclei to form a triploid endospermic structure that serves as food for the growing embryo in the seed.
Now based on the above explanation, the diploid plant cell with 20 chromosomes will have 10 chromosomes (half as much) in its gametes as a result of meiosis. This 10 chromosomes in each gamete (sperm and ovum) fuses to form a diploid zygote with 20 chromosomes, while one haploid sperm cell (10 chromosomes) also fuses with two haploid polar nuclei (10 chromosomes each) to form a triploid endosperm with 30 chromosomes i.e. 10+10+10.
C. Statement 1 is about an everyday life theory, and statement 2 is about a scientific theory.
Explanation - Statement 1: Children knocked over the trash can while cycling is an example of everyday life theory whereas Statement 2: Plant cells generate from sunlight and chlorophyll is an example of scientific theory.
In everyday life, if Children are not taught or explained, then they tend to throw the garbage or trash here and there thereby littering the street. Applying the scientific theory, plant cells uses sunlight, water, carbon dioxide and chlorophyll to perform photosynthesis.
<span>the platelets in the blood comes in contact with air they decompose to form thermoplastic, thermoplastic combine with inactive thrombotic, formed by the combination of Vitamin K and Calcium ions,to form active thrombi,thrombi combines with the fibrin in the blood plasma to form Fibrin, this Fibrin entangle with blood corpuscles and thus clot is formed... i hope i helped
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