A vestigial structure in humans is
earlobe
gallbladder
tailbone
villus
Correct answer is C
A vestigial structure in humans is the tailbone, also known as the coccyx.
Vestigial structures are anatomical features that have lost their original function over the course of evolution. These structures were once functional and served a purpose in the ancestors of the species but have become reduced or non-functional in the present-day descendants. The tailbone, or coccyx, is a small triangular bone located at the base of the vertebral column in humans. It is a vestige of the tail that was present in the early ancestors of mammals, which had tails for various functions, such as balance, communication, or grasping.
What is the probability that a pregnancy would result in a male child?
¾
½
1
¼
Correct answer is B
In humans, the sex of a child is determined by the combination of sex chromosomes received from the parents. The mother contributes an X chromosome, and the father contributes either an X chromosome (resulting in a female child) or a Y chromosome (resulting in a male child).
Since the father can contribute either an X or a Y chromosome, there are two possible outcomes for the sex of the child: male (XY) or female (XX). The chance of having a male child (XY) is equal to the chance of having a female child (XX).
Therefore, the probability of having a male child is 1 out of 2, which is represented as ½.
The mouthparts of a grasshopper are adapted for
sucking
chewing
grinding
absorption
Correct answer is B
Grasshoppers are herbivorous insects that primarily feed on plant material. Their mouthparts are well adapted for chewing, allowing them to consume various parts of plants, such as leaves, stems, and flowers.The mouthparts of a grasshopper consist of several structures that work together during feeding:
Mandibles, Maxillae and Labium and Labrum.
community
biosphere
niche
population
Correct answer is A
A community in ecology refers to a group of different species that inhabit the same geographic area and interact with one another. These species share a common habitat and are interconnected through various ecological relationships. In a community, the interactions between different species can be complex and can include competition, predation, mutualism, commensalism, and parasitism.
The diagram below is an illustration of a mango leaf drawn by a student in a Biology test. The student failed the test. Study it and answer the question.
which features of the diagram would have earned the student more marks if shown
colour and size
spelling the label and length of midrib
habitat and agricultural qualities of leaf
title and margin
Correct answer is D
No explanation has been provided for this answer.