TRUE. Roots have tiny root hairs that maximize the plant's ability to absorb water.
Root hairs are found in the exterior of the root called epidermis. They are long membranous extensions from epidermal cells. They increase the surface area of the root thereby maximizing its absorption of water and minerals.
Light is the energy source for plant photosynthesis, particularly sunlight.
Chlorophyll is contained in organelles called chloroplasts.
A by-product of photosynthesis is oxygen.
Answer:
The correct answer is: Immunosenescence.
Explanation:
- Immunosenescence can be defined as a biological age-related phenomenon due to which the cells of the immune system are unable to function efficiently with increase in age.
- As a result of this the aged individuals becomes susceptible to various infections and diseases.
- This happens because of the following reasons:
- The immune cells are formed from the progenitor cells called the Hematopoetic Stem Cells (HSCs) which are abundantly found in the bone marrow. These cells have the capacity of self-renewal and also differentiation into various types of immune cells. Due to aging, these cells accumulate large number of Reactive Oxygen Species (ROS) that that causes oxidative damage to the DNA. Also, with age the telomere (the repititive DNA sequence located at the chromosome terminal that protects the end of the chromosome from undergoing recombination or fusion with other chromosomes) length shortens resulting in the generation of damage in DNA. All these reduces the self renewal and differentiation capacity of these cells.
- Other cells of the immune system like, the white blood cells, anti-body producing B-cells, cytotoxicity inducing T-cells, natural killer cells also accumulate similar DNA degrading components. This reduces their life time and also the efficiency of their activity.
Answer:
D. Water from rivers, lakes, and streams seeps into the ground and saturates it to reach the water table.
Explanation:
No time, the first three do not make sense or are wrong
Answer:The answer is B because with 3/4 of the L trait being dominant, it’s impossible to have an offspring with the recessive trait
Explanation:
<span>Now that franks in my body, my non-specific immune responses will automatically target him. once my white blood cells notice him they'll begin their counterattack. the basophils in my bloodstream will release a chemical substance called histamine. Histamines cause inflammation and increased blood flow. This brings neutrophils and monocytes to the site. Neutrophils are attracted by inflammation and infection. Like basophils, they, too, contain granules filled with powerful chemicals that are released when they encounter foreign invaders. They can also gobble up these antigens and kill them before they enter the bloodstream.</span>
