Answer:
Recessive lethal genes can code for either dominant or recessive traits, but they do not actually cause death unless an organism carries two copies of the lethal allele. Examples of human diseases caused by recessive lethal alleles include cystic fibrosis, sickle-cell anaemia, and achondroplasia.
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Answer:
False
Explanation:
Mass and volume are two different quantities. In fact:
- Mass is a scalar quantity representing the "amount of matter" contained in a certain substance. It is measured in kilograms (kg), which is one of the 7 fundamental SI units.
- Volume is a scalar quantity representing the amount of "three-dimensional space" occupied by an object or a substance. It is measured in cubic meters (
).
Therefore, mass and volume are two different quantities. They are related through another quantity called density, given by:
![d=\frac{m}{V}](https://tex.z-dn.net/?f=d%3D%5Cfrac%7Bm%7D%7BV%7D)
where
m is the mass
V is the volume
So the density of a substance represents the amount of mass contained in a certain volume of the substance.
Answer:
A. The rock was made from more than one type of material
C. Sediments and other matter were deposited in layers before lithification
The reproductive system in both males and females are controlled and regulated by the interaction of hormones from the hypothalamus and pituitary glands with hormones from the reproductive organs. How do these hormones affect the development of male and female reproductive systems
Answer:
pollution is the introduction of harmfull material in the invironment called pollution