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SVETLANKA909090 [29]
3 years ago
6

Why does it become difficult to read old fossils?

Biology
2 answers:
notsponge [240]3 years ago
6 0
A is the correct answer
Lina20 [59]3 years ago
4 0
A. is the answer because they are found in the earths crust because overtime dirt and water covered the fossils

if i helped plz make me brainiest
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How long do mud turtle eggs take to hatch?
andriy [413]
For most turtles the incubation ranges from 45 and 75 days.
5 0
4 years ago
How is a carrier shown in a pedigree?
liraira [26]

Answer: Pedigrees can show someone is a carrier for diseases by determining which parent, if not both, is either dominant or recessive. Each child must have a letter from their parent then that will determine if someone gets a disease or not then it goes on from generation to generation. However, they can be carriers of the trait, and if they are carriers, their male children will be colorblind. On a pedigree, carriers are represented either by a half-shaded symbol or a shaded dot in the middle of the symbol.  brainliest??

Explanation:

4 0
3 years ago
Which sugar is present in the nucleic acid that is represented in the diagram?
S_A_V [24]

Answer:

either deoxyribose or ribose

Explanation:

i can't see the diagram, but-

  • if the diagram shows a single stranded chain of rna, then the answer is ribose
  • if the diagram shows a double stranded chain of dna, then the answer is deoxyribose
  • uracil and thymine are nucleic acids, not sugars/carbohydrates
8 0
4 years ago
Read 2 more answers
Which of the following statements about the development of infectious diseases is correct?
zalisa [80]

The period of Convalescence is the time during which the person regains health and fully recovers.

Explanation:

  • Diseases that can spread from one person to other  are called infectious disease.
  • Disease development is divided into Incubation period, Prodromal period, period of illness, Decline period, and period of Convalescence.
  • During incubation period the pathogen enters the host body and starts multiplying itself. But the signs of diseases are unnoticeable.
  • Then comes  the prodromal period, when the pathogen keeps multiplying itself and some signs of disease are observed but they are not obvious
  • After the prodromal period comes the period of illness when the patient exhibits obvious signs of sickness.
  • As the period of illness is over the symptoms of disease start to cease and the the number of pathogen decrease in body.This period is the period of decline.
  • Finally comes the period of Convalescence when the person returns to his pre-disease state and is completely healthy. (except irreversible damage caused by the disease)
7 0
3 years ago
How do the flowers help the tree meet its needs? AFlowers make food for the plant B. Flowers hold the plant in the ground. C. Fl
azamat

Answer:

Answer is option D.

Flowers contain parts for making seeds.

Explanation:

The part of the plant that is responsible for the sexual reproduction in plants is known as flowers. A flower is said to be complete if contains sepals, petals, stamens and pistil. If the flower lacks one or more structures, it is an incomplete flower.

A complete flower consists of a vegetative part and a reproductive part. The vegetative part contains petals (a bright coloured structure that attracts insects and birds) and sepals (a green coloured structure that protects rising buds and is usually found beneath the petals). The reproductive parts include stamen or androecium (male reproductive organ) and pistil (female reproductive organ). A flower may consists of only female parts or only male parts, or both.

Stamen contains two parts - anther, which produce and store the pollens (male gametes) and filament, which support the anther. Pistil contains three parts - stigma, which receives the pollen grains and style that connects stigma and the ovary, and ovary which contains a lot of ovules (female gametes) which forms the seed.  

Flowers reproduce by pollination, a process in which the pollen are transferred to the stigma of another flower. A pollen tube emerges from the pollen grain and grows through the style and reaches an ovule inside the ovary. Then the nucleus of the pollen grain passes through the pollen tube and fuses with the nucleus of the ovule and this process is known as fertilisation. The fertilised ovules become seeds and the ovary transforms into the fruit. The seeds are dispersed through various methods and the embryo inside them will grow into adult plants.

5 0
3 years ago
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