Answer: B. They are a first line of defense that can begin killing pathogens immediately.
Explanation:
B-lymphocytes are not the first line of defense. On the contrary, innate immune cells such as basophils, dendritic cells, eosinophils, Langerhans cells, mast cells are the body's first line of defence.
Answer:
1/2 or 50%
Explanation:
<em>From the illustration, we will logically assume that the white allele is dominant over the black allele. Let us also assume that the white allele is represented by A, the alternate black allele will be a. </em>
The heterozygous white rabbit will have the genotype Aa.
The black rabbit will have the genotype aa.
Crossing the two rabbits together:
Aa x aa
Aa Aa aa aa
<em>1/2 Aa - white color </em>
<em>1/2 aa - black color</em>
Hence, the probability of getting a black rabbit offspring is 1/2 or 50%
Answer : Binary Fission which grows exponentially.
Explanation : Binary fission actually means binary - consisting two and fission - cleavage into halves. It is one of the modes of asexual reproduction.
This type of fission is majorly observed in the asexual reproduction in prokaryotes. It is rarely seen in some some single-celled Eukaryotes like Amoeba and Paramecium.
Also, In binary fission there is DNA replication and segregation which occurs simultaneously.
This increases the graph exponentially as the growth gets faster and faster with the passing period of time.
A reference image of binary fission is attached in the answer.
The correct statement is D. APICAL MERISTEMS ARE SOMETIMES CHANGED INTO FLORAL MERISTEMS.
Apical Meristems are found in the tips of the roots and in the buds of the shoots. They supply cells for the plants to grow in length.
Apical Meristems are found in herbaceous plants, woody plants, grasses, and flowering plants.
In flowering plants, shoot apical meristem develops into an inflorescence meristem which produces the floral meristem. The floral meristem is responsible for the production of the sepals, petals, stamens, and carpels of the flower.
