The stratum corneum, the fifth, outermost layer is thick with rows of dead cells. These cells contain soft keratin<span>, which keeps the </span>skin<span> elastic and protects underlying cells from drying out. The dermis, </span>called<span> "true </span>skin<span>, " is the layer beneath the epidermis
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Answer:
The correct statements are:
- Meiosis results in four haploid daughter cells.
- During meiosis, the 2N mother cells produce N daughter cells.
- In both processes, DNA replication must occur.
- Mitosis is responsible for genetic continuity; in higher organisms, it is essential for growth and repair.
Mitosis is a type of cell division in which a parent cell is divided into two identical daughter cells. Each daughter cell contains identical genetic material as that of the parent cell.
It plays important role in growth and repair of cells and tissues in multi-cellular organisms.
Meiosis is a type of cell division in which a parent cell is divided to produce four daughter cells. Each daughter cell contains exactly half the genetic material (chromosomes) as that of parent cells
It plays important role in the production of gametes (eggs and sperms) in sexually reproducing organisms.
Before either cell division, the DNA is replicated in the S or synthesis phase of the cell cycle.
Primary succession happens in a place where there is no soil cover or it is removed.
an abandoned field- Secondary; because there is cover of soil left, even if vegetation is removed.
<u>a cooling lava flow- Primary</u>; volcanic events lead to loss of soil layer, so this would lead to primary succession
<u>a valley under a glacier- Primary</u>; retreating glaciers are lead to primary succession
an unused farm-Secondary; the soil cover is still present
a burnt forest- Secondary; soil cover is still left for vegetation to start over again
<u>a deserted mine- Primary</u>; because there would be barren rocks left, so soil would be formed by pioneer species first.
Answer:
See the answer below, please.
Explanation:
Thermodynamic systems (that portion of the universe under study), can be defined as closed, open or isolated.
Closed systems: those in which only energy is exchanged (either in the form of heat or work) but not matter with the surroundings.
Open systems: those that exchange matter and energy with the surroundings.
Isolated systems: are those in which there is no exchange of energy or matter with the surroundings.
I believe the correct answer is C
