vaccines are weakened viruses or bacteria that prompt the body to develop antibodies to foght against disease
Answer: The correct answer is-
C.They replaced carbon dioxide with oxygen in the atmosphere.
Cyanobacteria ( also known as blue green algae) is a large phylum of bacteria that is capable of synthesizing its own food using carbon dioxide and water in the presence of sunlight ( photosynthesis).
They contain a green pigment called chlorophyll that absorbs energy from sunlight and helps in the formation of food ( glucose). They release oxygen as a byproduct in the atmosphere.
As these organisms utilize carbon dioxide ( that is present in the atmosphere) to give oxygen in return, therefore, they affected early atmosphere of Earth by replacing carbon dioxide with oxygen.
Thus, option C) is the right answer.
Answer:
Which of the following pairs of terms is mismatched?
D. bacteriostatic – kills vegetative bacterial cells
Explanation:
All the options mentioned are different methods of antimicrobial control. Germicide is a product that kills microbes, a sterilant destroys all living microorganisms, fungicide kills yeasts and molds and virucide inactivates viruses. When it comes to a<em> bacteriostatic agent not necessarily kills bacteria, but it stops them from reproducing. </em>To take into account, the best method to sterilize heat-labile solutions is membrane filtration.
Tissues are collections of similar cells that help perform a common function in which the body has levels of organization that build on each other. The cells make up tissues, tissues make up organs and organs create up organ systems. The following are the different types of tissues and its functions:
• The epithelial tissue covers, lines organs and body cavities and layers.
• The muscle tissue moves, creates up all muscles and long and contracted so they can bond to permit movement.
• The nervous tissue, signals, contains neurons and neuroglia and long axons to permit signals to travel spaces, outlets for networks.
• The connective tissue joins, adipose or as called fat, blood, ones, cartilage and fairly consistent matrix to allow it to fill spaces of various shapes/sizes.
Answer:
Gamete :
A reproductive (sex) cell. In males, sperm; in females, eggs
Fertilization:
The process in sexual reproduction in which a male gamete and female gamete fuse to form a new cell
Zygote:
Cell resulting from fertilization
Diploid (2n):
Cell that contains two sets of homologous chromosomes
Haploid (n):
Cell that contains only a single set of genes
Apoptosis:
the process of programmed cell death
Differentiation:
The process by which cells become specialized in structure and function