Science Q2 - Life Cycles Flashcards
Refers to the series of changes an organism undergoes from birth to adulthood.
life cycle
Many plants start off as a ______.
seed
Every seed holds a miniature plant called the______.
embryo
The hard part that covers the seed is called the _______; it protects the embryo.
seed coat.
The embryo gets nourishment from the stored food, called ______, in the seed.
cotyledon.
The seed sprouts and produces a tiny plant called a _______.
seedling
The process wherein the young plant, then starts to come out is called _________.
germination
True or False: It is important that the seed is planted in the right place at the right time for it to germinate.
True
_____ are reproductive parts of a plant.
Flowers
________ is the process of producing new plants.
Reproduction
Give some examples of fleshy fruits?
avocado, watermelons and oranges.
Some animals are hatched from eggs. They are called _____
oviparous animals.
Give some examples of oviparous animals.
birds, snakes, frogs, and insects.
_____ are animals that are covered with feathers and have wings.
Birds
A baby bird that is hatched is called a _______.
hatchling.
When the bird stays on the nest and is completely dependent on its parent, it is called a ________.
nestling.
True or False: Most nestlings are naked and blind. They are still being fed by their parents.
True
After a few weeks, the feathers of the nestlings start to develop and the babies leave the nest. They are now called _______.
fledglings
Changes in appearance that occur between hatching and the adult stage are called ________.
metamorphosis
Insects exhibit two types of metamorphosis-
incomplete
complete
Incomplete metamorphosis happens in _______ and _______.
grasshoppers
crikets
The egg of a grasshoppers hatches into a _______, which is a young grasshopper.
nymph
Is a type of metamorphosis wherein a series of changes that an insect undergoes from being an egg to an adult.
Incomplete metamorphosis
Is a type of metamorphosis wherein a series of changes involving an egg, a larva, a pupa, and a mature insect.
Complete metamorphosis
Complete metamorphosis happens in ______ and _____.
butterflies
moths
An adult female butterfly lays eggs under the leaves of a plant. After 10 to 15 days, the egg hatches into a small larva called _______.
caterpillar
The caterpillar feeds on the leaves, stems, and roots of a plant with its pair of jaws. It moves using 1.____ pairs of true legs, and 2.____ pairs of prolegs.
1.three
2. five
After several days, the caterpillar forms a ______ around its body.
pupa
The pupa is also called ______.
cocoon or chrysalis
An adult butterfly usually lasts for ____ weeks.
2
The real legs of a caterpillar will become the legs of the adult and the ______will disappear during metamorphosis.
prolegs
A ______ is made up of thousands of single egg, each with a black embryo surrounded by a jellylike coating.
spawn
Frog lay eggs in ______ or _____,
cluster
clumps
Toads lay eggs in ________.
long strands
Young frog is called ______
tadpole.
Other animals like dogs, cats, rabbits, cows, and horses give birth to their young. They are called _________.
viviparous animals.
The young of the horse is called a _____.
pony
True or False: Horses are greatly affected by environmental changes.
True
True or False: Water is valuable resource for horses.
True
True or False: You were an infant from birth to two years of age.
True
_____ extends from two years to puberty. This is also a period of rapid growth.
Childhood.
________starts from puberty to adulthood.
Adolescence
______ occurs when the reproductive system of the female discharges blood and tissue. It marks the beginning of puberty and continues until the late middle age.
menstrual cycle
is the period from ages 20 to 40. Certain changes associated with aging begin.
early adulthood
is the period from ages 40 to 65. Aging speeds up during this time and is characterized by further vision problems, hearing loss, and the end of reproductive capability for women, known as menopause.
middle adulthood
is the period from 65 onward. Physical changes continue to occur at a rapid pace and the brain also begins to weaken, resulting in memory loss.
late adulthood
True or False: Changes in the environment affect not only the plant and animal cycles but also the human life cycle.
True
True or False: Many adults have been able to slow down the aging process by exercising and by practicing a balanced, nutritious diet.
True
A plant may start as a _____ , then matures into a plant.
seed
The stages of human development are ______, _______, _______, and _______.
infancy
childhood
adolescence
adulthood
