The correct answer is biological.
When any pathogen invades the body, it has to pass several line of defence. The first barrier is skin and mucous membrane which is a physical and chemical barrier. The second line of defence is non specific response by macrophages, neutrophills and interferon. After crossing these two barriers the third line of defence comes into action in which, the B- cells and T-cells acts specifically on the pathogen and destroys it.
The body will use the biological immune responses to destroy the disease-causing bacteria which crosses the first and second lines of defense.
The immune system is the system of organs and tissues as well as cells which work together to protect the body from diseases.
The first line of defence of the immune system is the skin an mucous membranes.
The second line of defense is the macrophages.
The third line of defense is the immune cells such as B-cells and T-cells which are biological immune responses.
Therefore, the body will use the biological immune responses to destroy the disease-causing bacteria which crosses the first and second lines of defense.
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As a galaxy gets farther away from Earth it gets faster.
Explanation:
First, moving away “from the Earth”. They certainly aren’t going away from the Earth. Everything is moving apart from everything else. No matter where you are in this expanding world, everything else will seem to be dropping from you. The space in within the galaxies is expanding! And the farther away a universe is the more space there is to increase so the faster the galaxy appears to move away from us.
Protozoans can move using pseudopodia, cilia, and flagella, but not by budding. The correct answer is d. budding.
You are absolutely correct, and I appreciate the clarification.
Protozoans employ various methods for movement, including pseudopodia, cilia, and flagella, with budding having no connection to their locomotion.
Pseudopodia are temporary extensions of the cell membrane utilized by organisms like Amoeba for both movement and prey capture.
Ciliates utilize numerous hair-like structures called cilia for propulsion, while flagella are whip-like structures used by certain protozoans like Euglena.
Importantly, budding is a distinct process related to asexual reproduction and not a means of protozoan locomotion.
Therefore, the correct answer is d. budding.
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c. has varied greatly over time.
b. has varied slightly over time.
d. None of the above.
Answer:
Option B, has varied greatly over time
Explanation:
The climate change on planet earth is a long and continuous process which is ongoing till today. It is believed that some four billion years ago, the atmosphere of earth was made up of radical ions and also the earth was excessively hot. After this phase the life evolved on earth and the climate also improved. After several years of its formation, the earths climate again took a drastic turn when the ice age came and every thing just got frozen. This occurred during the Pleistocene Epoch period some 2.6 million years ago.
Later on , the ice age also passed and now a days temperature is rising year by year due to global warming.
Due to these drastic conditions it can be said that the climate of earth changed greatly over time.