An organ or cell that acts in response to a stimulus
A hormone secreted by the anterior pituitary gland which promotes the formation of ova or sperm.
A hormone produced by the anterior lobe of the pituitary gland that stimulates the growth of the ovum-containing follicles in the ovary and activates sperm-forming cells —abbreviated to FSH
The major endocrine gland, a pea-sized body attached to the base of the brain that is important in controlling growth and development and the functioning of the other endocrine glands
Regulatory substances produced in organisms and transported in tissue fluids such as blood or sap to stimulate specific cells or tissues into action.
A hormone secreted by the anterior pituitary gland that stimulates ovulation in females and the synthesis of androgen in males
A female hormone that causes development and change in the reproductive organs
A procedure in which eggs (ova) from a woman's ovary are removed. They are fertilized with sperm in a laboratory procedure, and then the fertilized egg (embryo) is returned to the woman's uterus.
Oral contraceptives are medicines taken by mouth to help prevent pregnancy. They are also known as the Pill, OCs, or birth control pills
A steroid hormone released by the corpus luteum of the ovary that stimulates the uterus to prepare for pregnancy.
the orientation of a plant or other organism in response to light, either towards the source of light ( positive phototropism ) or away from it ( negative phototropism )
A turning or growth movement by a plant or fungus in response to gravity.
A venomous rattlesnake species found in the United States and Mexico.
Saguaro National Park, located in Tucson, Southern Arizona, is part of the United States National Park System.
People entrusted with protecting and preserving parklands – national, state, provincial, or local parks.
A wide variety of teaching techniques and lesson adaptations that educators use to instruct a diverse group of students, with diverse learning needs, in the same course, classroom, or learning environment
UK: The prescribed syllabus that pupils must be taught ateach key stage in the National Curriculum
The acceleration of an object moving in a circle at a constant speed. Centripetal acceleration always acts towards the centre of the circle
When fission neutrons cause further fission, so more fission neutrons are released. This goes on to produce further fission.
In a closed system, the momentum before a collision/event is equal to the total momentum after the collision/event.
A lens that makes light rays near and parallel to the principal axis converge to a point, known as the principal focus
capable of injecting venom by means of a bite or sting
Crotalus atrox, the western diamondback rattlesnake, is a venomous rattlesnake species found in the United States and Mexico. It is likely responsible for the majority of snakebite fatalities in northern Mexico and the second-greatest number in the U.S., after C. adamanteus.
These are the equations of motion for a body undergoing constant acceleration
where..
s = distance (metres, m)
u = initial velocity (metres per second, ms^-1)
v = final velocity (metres per second, ms^-1)
a = acceleration (metres per second squared, ms^-2)
t = time (seconds, s)
where..
s = distance (metres, m)
u = initial velocity (metres per second, ms^-1)
v = final velocity (metres per second, ms^-1)
a = acceleration (metres per second squared, ms^-2)
t = time (seconds, s)
A scalar quantity is one which has magnitude but no direction.
A vector is a quantity which has direction as well as magnitude.
Total distance moved by an object along a particular direction.
The rate of change of distance with respect to time.
The rate of change of displacement with respect to time.
A body continues in its state of rest or constant velocity unless a resultant force acts on it.