Most Female frogs lay their eggs in water. male frogs release their sperm into the water to fertilize the eggs, this is an example of?
A) internal fertilization
B) external fertilization
C) metamorphosis ***
D) Alternation of generation
Male bowerbirds spend much of there time decorating their nest, what is most likely the reason they do this
A) to cushion the nest for future chicks
B)to hide the nest from predators
C)to make their nest easier to find when the male comes back with food
D)to attract female bowerbirds***
1. no
2. yes
1.A 2.D
1. B 2. a or d
The first question is asking about the reproductive behavior of frogs. To determine the correct answer, we need to understand the terms "internal fertilization" and "external fertilization."
Internal fertilization occurs when the sperm is deposited directly into the female's body, where fertilization of the eggs takes place. This is common in many mammals, including humans.
External fertilization, on the other hand, occurs when the sperm and eggs are released into the external environment, where fertilization occurs. This is observed in many aquatic organisms, including fish, amphibians like frogs, and some invertebrates.
Based on this information, the correct answer is B) external fertilization because male frogs release their sperm into the water to fertilize the eggs laid by female frogs.
Now, let's move on to the second question about male bowerbirds and their nest-decoration behavior.
Bowerbirds are known for their elaborate and artistic nest-building and decorating habits. To determine the purpose behind this behavior, let's go through the options:
A) to cushion the nest for future chicks: This choice suggests that the nest decoration serves a functional purpose of providing cushioning for future chicks. While this could be a possible reason for nest decoration in some bird species, it may not be the most likely reason for bowerbirds.
B) to hide the nest from predators: This option suggests that nest decoration helps bowerbirds camouflage their nests, making them harder to detect by predators. While camouflage is important for many bird species, it may not be the primary reason for the elaborate nest decoration seen in male bowerbirds.
C) to make their nest easier to find when the male comes back with food: This option suggests that the male bowerbird decorates its nest to make it more conspicuous and easier to find for the female bowerbirds when the male returns with food offerings. This aligns with the behavior of male bowerbirds, as they decorate their nests to attract female bowerbirds during courtship rituals.
D) to attract female bowerbirds: This option states that the primary reason for nest decoration in male bowerbirds is to attract female bowerbirds. This is indeed the most likely reason for their elaborate nest decoration habits. Male bowerbirds use their artistic abilities to create an impressive and visually appealing display, hoping to attract a mate.
Therefore, the correct answer is D) to attract female bowerbirds.