Answer:
The diameter of the xylem vessels should be small in order for the capillary action to take place.
Explanation:
The vessels through which water is transported to different parts of the plants and trees are the xylem. Water is transported in the trees through a mechanism named as capillary action. This mechanism can occur only if the diameter of the vessels are small.
The water molecules adhere to the walls of xylem and an upward force is generated. If the diameter of the vessels i.e xylem would be small then the surface tension between the xylem and water molecules would be enough to move the water in an upward direction.
Answer:
A. Heritable
C. Affected by the MC1R gene
D. Polygenic trait
Has evolved due to evolutionary processes such as natural selection.
Explanation:
Human skin color is a polygenic trait as it is regulated by more than one gene. Each allele of these genes has an additive effect on the overall skin color of an individual. Therefore, the trait is a continuous trait, not a discrete one. The genes for human skin color are transmitted from parents to progeny which in turn makes it a heritable trait.
The gene MC1R codes for melanocortin 1 receptor and thereby, regulate the skin color of humans since melanocyte-stimulating hormone binds to the receptor to trigger the synthesis of melanin from melanocytes. Evolution of various skin color in human beings is regulated by natural selection which in turn favors the skin tone best suited under the prevailing climatic conditions of a particular human population
Answer:
They are levels of taxonomy. There are six Kingdoms currently in use: Animalia, Plantae, Fungi, Protista, Archaea, and Bacteria. Archaea and Bacteria fall under the Domain Prokaryota and the rest are under the Domain Eukaryota.
Explanation:
Answer:
The correct answer is an element.
Explanation:
An element refers to a component whose atoms comprises a similar number of protons, or it can be said that the atoms of a specific element exhibit the same atomic number. Chemically, they are the simplest components, which cannot be further differentiated by any chemical means. The elements can get converted into other elements with the help of nuclear methods.
Answer:
1. Trait
2. Critical period
3. Toxins
4. Determinism
5. Continuum
6. Object permanence
Explanation:
1. Trait
A trait has to do with something that its stable and enduring e.g. Self-esteem -a personality trait that deals with an individual's beliefs, emotions and behaviours.
2. Critical period
A critical period is defined as a window through which a system sustains an increased sensitivity to a certain stimuli so as to develop in a functional form.
3. Toxins
A toxin is a poisonous substance manufactured within living cells or organisms. It doesn't comprise of synthetic toxicants which are produced by artificial methods.
4. Determinism
Determinism is a theory that holds on to the belief that every event, moral choices e.t.d are totally controlled by previously existing causes. It basically preclude free will since it believes that humans cannot behave in certain ways otherwise than the way they do.
5. Continuum
It has to do with spectrum, range, or series.
6. Object permanence
Object permanence is the concept of objects being in existence even when the objects cannot be felt (seen, heard, touched, smelled or sensed in a particular form).
