BIOLOGY HIGH SCHOOL

_____________ take up stations in tissues and act as scavengers, devouring pathogens and worn -out cells.A. Natural killer cells
B. Amino acid cells
C. Enteric cells
D. Macrophages

Answers

Answer 1
Answer: D. Macrophages


These cells, unlike Neutrophils, tend to go and settle in a tissue and kill pathogens as well as worn out cells. Natural killer cells are used for something similar - they kill cells that have been infected by a pathogen and are displaying the pathogen's antigen on their surface (antigen presentation) - this is how the Killer-T-cells are able to recognise which cells need to be destroyed.

Related Questions

When the Linnaean system of classification was first developed in the early 1700s, it only had two kingdoms for living things, the plant and animal kingdoms. Three more kingdoms have been added since then, as well as a higher division of three domains. Why are we still using this system if we have to keep changing the way it is organized?
What is the function of the cell membrane?
Why energy is needed for active transport
Changes in allelic frequency are always driven by natural selection.
Trey is looking at a cell under the microscope. It is attached to many other cells, and it has a nucleus and membrane bound organelles. It has no cell wall. In which kingdom should this organism be classified?

The avoidance of personal prejudice or bias is an important trait of a scientist. a. True
b. False

Answers

true- it's not good if the scientist changes the outcome and reads data with a bias because then it's not 100% honest. 

Organisms that have genes from another species spliced into them are called ______________________. A- enucleated B- vectors C- gene knocks D- transgenic

Answers

D, transgenic. Hope this helps.

In human DNA, adenine (A) makes up approximately 30.9% of the bases, andguanine (G) makes up approximately 19.9% of the bases; therefore the percentage thymine (T) and cytosine (C) are
(A) 19.8% T and 19.8% C.
(B) 19.8% T and 29.4% C.
(C) 29.4% T and 19.8% C.
(D) 29.8% T and 29.8% C.
(E) 19.9% T and 30.9% C.
Can you please explain with some details?

Answers

In human DNA, there are nitrogenous base pairings- A, T C and G. A pairs with T and C pairs with G. Because they're a pair, the ratio of A:T and C:G should be as close to 1:1 as possible. Since A makes up approx 30.9%, T should be either C or D. As G makes up approx 19.9%, we can rule out option D, therefore the answer is C! Hope this helps (:

True/False: HDL removes cholesterol from cells and returns to the liver for excretion.

Answers

Answer:

No.

Explanation:

HDL is high-density lipoproteins. They carry other cholesterols to the liver. The liver then removes cholesterol.

Final answer:

HDL indeed removes cholesterol from the cells and returns it to the liver for excretion, making it known as the 'good cholesterol'. This process is important because it helps to prevent harmful cholesterol build-up in arteries.

Explanation:

True, HDL or High-Density Lipoprotein does indeed function to remove cholesterol from the cells. It carries cholesterol from other parts of your body back to your liver. The liver then processes the cholesterol for excretion from the body. This process is one of the reasons why HDL is often referred to as the 'good cholesterol'. Because this process helps to stop the build-up of harmful cholesterol in your arteries, a higher amount of HDL can lower your risk for heart disease and stroke.

Learn more about HDL here:

brainly.com/question/32352989

#SPJ11

Rhizoids are the _____ of bryophytes.

Answers

The answer is root hairs.

Rhizoids derive from epidermal cells of bryophytes. They are hair-like structures similar to roots of vascular plants. But, they are unicellular structures, unlike roots, which are multicellular. Not only they look alike, but they have similar functions as roots. The functions of rhizoids are the absorption of water and minerals from the soil and a support of the bryophytes.

Why would genetic material need to be able to reproduce

Answers

so that the next generation could inherit the previous adaptations and instinct and be similar to the parents. if that didn't happen, a cat might give birth to a giraffe
Other Questions
Which kind of carbon dating can be used to determine the exact age of the rock and which kind of carbon dating is used to compare the ages of rocks?
Different mRNA molecules can have poly-A tails of different lengths. Considering the purpose of adding the poly-A tail (from the previous question), why are some tails longer than others?
A scientist wrote a paper titled “Directional Selection in Action” after observing a population of mice for 15 years. The mice typically preferred to eat berries, although a few would also eat insects. After a drought in year 3, the scientist observed that more mice were eating insects. By year 10, most of the mice in the population ate insects in addition to berries. Which best describes her article?
Government sanctioned activities to improve ecosystems have had little effect.TF