1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
KatRina [158]
4 years ago
13

What did scientists like Darwin use to group species before DNA? two sentences, please!

Biology
2 answers:
Vlada [557]4 years ago
6 0

Answer: Species May share the same anatomy. Also observing DNA can show likeness with one another.

Explanation:

Natasha_Volkova [10]4 years ago
3 0

They used to group organisms by watching their physical characteristics. For example animals with spines are grouped into vertibrates and organisms without spine are grouped into invertebrates . They also group organisms based on habitatats ( where the organisms live) . For example marine animals live in water and terrestrial organisms live in land. They grouped organisms based on their feeding behaviour. For example producers produce their own food.

You might be interested in
What generally happens to the number of leaves as the leaf surface area decreases?
likoan [24]

As the leaf surface area decreases ; Number of leaves increase inmost plants.

As the leaf surface area increases, the rate of transpiration increases as well because leaves with large surface areas have bigger stomata. also the smaller the leave surface area of a plant/tree the denser the leaves the plants/tree will have.

Trees with tiny leaves tend to have a lot of leaves because of the decrease transpiration rate occurring in the leaves of the plants .

Hence we can conclude that what generally happens to the number of leaves as leaf surface area decrease is number of leaves increases in most plants.

Learn more : https://brainly.in/question/28299771

8 0
3 years ago
In humans, the eye color and hair color genes are located on different chromosomes. Brown eyes (B) are dominant to blue (b), and
Andrej [43]

Answer:

Man's genotype: Bbdd

Woman's genotype: bbDd

First child's genotype: Bbdd

Second child's genotype: bbDd

Explanation:

This is a dihybrid cross involving two genes; one coding for eye color and the other for hair color in humans. The allele for brown eye (B) is dominant over the allele for blue eyes (b) in the first gene while the allele for dark hair (D) is dominant over the allele for red hair (d) in the second gene.

According to the question, A man with brown eyes and red hair will possibly possess genotypes: BBdd or Bbdd while a woman with blue eyes and dark hair will possibly have genotype: bbDD or bbDd. Considering the fact that they produced children with recessive traits for both gene (blue eyes and red hair), it means that they are heterozygous for their dominant trait. This means that the ideal genotype for the man is Bbdd since he will produce gametes containing B and b alleles for the first gene while the ideal genotype for the woman is bbDd since it will produce gametes with D and d allele for the second gene.

Hence, a child with brown eyes and red hair will possess genotype: Bbdd since he/she cannot receive two dominant alleles for the first gene from both parents. A child with blue eyes and dark hair will have genotype: bbDd since he/she cannot receive two dominant alleles of the second gene from both parents.

3 0
3 years ago
What does the theory of evolution tell us about how organisms adapt to their environment over time?
beks73 [17]

Answer:

a

Explanation:

7 0
3 years ago
The heart is an example of which level of organization within an organism?
mihalych1998 [28]

The heart is an example of an organ.

3 0
3 years ago
¿Qué es reproducción?
Ivanshal [37]
Es una descendencia. es un nuevo organismo
8 0
3 years ago
Other questions:
  • Which type of dwarfism affects only the long bones? They have a normal size, head and torso.
    15·1 answer
  • Iron is a type of metal. Therefore, the iron has a sparkling surface nature. However Iron is easy to rusty. Why?​
    13·1 answer
  • Corals are polyps of coelenterates (cnidarians) that contain numerous algae in their tissues. the algae contain photopigments th
    14·1 answer
  • Put the steps of Meiosis in order.
    10·1 answer
  • Populations of blue-winged warblers, a type of bird, migrate south in the winter and return to Canadian breeding grounds in the
    8·1 answer
  • When conducting research that involves collecting biological specimens for genetic testing, which issue is the most important fo
    14·1 answer
  • 3. The diagram below represents the organizational levels of living things. Which of the following examples represents an exampl
    5·2 answers
  • A neuron is ______<br> A. pluripotent<br> B. multipotent<br> C. unipotent<br> D. totipotent
    7·1 answer
  • Which of these groups is the smallest level of classification?
    15·2 answers
  • Why is the sequence of amino acids important to the properties of a protein and
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!